Ubisoft is finally dropping an update for the new year. The Rainbow Six Siege Y10S4.2 patch is bringing major rework to operators. Rainbow Six Siege latest update brings some of the biggest changes. This mid-season balancing will definitely affect the current meta. From a massive rework to Thorn’s lethality to the return of a fan-favorite shotgun for Mozzie, the "refined" meta is shifting toward faster gadget activation and improved secondary utility.
Therefore, in this guide on the Rainbow Six Patch notes, we will take you through everything new. This will include the Rainbow Six Siege Thorn rework and other bug fixes.
Defender Balancing
The biggest winners of Y10S4.2 are the Defenders. Epic-level changes to Thorn and Echo are designed to make site defense more dynamic.
Thorn Rework
For a long time, Thorn was seen as a "weaker Frost." Her Razor Blooms took too long to explode, often allowing Attackers to simply run past them. That changes today.
- The Rework: The trigger time has been taken way lower. It will now take 1.35 seconds.
- The Trade-off: However, the rework also reduced her max damage. It is now lowered to 125. While it’s less likely to "insta-kill" a full-health 3-armor, it is now much harder to escape.
- The Penalty: Even if an Attacker survives the blast, they now suffer a 15-second bleed and slow debuff. This mimics the "Frost Mat" effect, making them easy pickings for roamers.
- Tactical Tip: With 4 Shells instead of 3, you can now use Razor Blooms reactively. Instead of hiding them in corners, throw them behind an Attacker once they enter a room to force them into a panic.
Mozzie Rework
Year 5 fans, rejoice. Mozzie has officially regained the Super Shorty shotgun as a secondary weapon.
- Why it Matters: This restores Mozzie's ability to create his own rotation holes and "lines of sight" without wasting primary ammo. It makes him a self-sufficient roamer who can deny intel and reshape the map simultaneously.
Echo Rework
Echo now carries 3 Yokai drones (up from 2).
- The Strategy: This change doesn't make the drones stronger, but it makes Echo more resilient. Losing one drone early no longer cripples your late-round plant denial. You can now keep one drone on-site and use the other two for active scouting in high-traffic hallways.
Weapon & Refinement Polishing
The latest Rainbow Six Siege update is also improving the game. These updates are just going to make the game feel fairer and more balanced.
The UMP45 Buff
Players have complained about this gun’s slow firing rate. Therefore, the devs have decided to increase this gun’s damage. It is now going to be 42.
- The Breakpoint: This change is massive. You can take down any base armor with just three bullets. The gun now also has better recoil for distant fights.
Refinement Highlights
| Operator | Change | Tactical Impact |
| Jackal | Scan Range: 12m (was 8m) | Allows for safer scans from outside windows or across long hallways like "90" on Villa. |
| Lion | Scan Duration: 3s (was 2s) | Provides an extra second of wall-hack utility, making it easier for teammates to time their swings. |
| Maestro | Battery Life: 8s (was 6s) | Gives the Evil Eye 33% more "zap" time, forcing Attackers to deal with them immediately or lose significant health. |
| Capitão | Burn Time: 13s (was 10s) | Perfect for post-plant denial; three extra seconds can often win the round by preventing a defuse. |
| Osa | Deployment: 1.8s (was 2.3s) | Makes Osa much safer when pushing into a contested doorway. |
Bug Fixes in User Experience
No patch is complete without cleaning up the technical side. Y10S4.2 addresses several frustrating issues:
- Map Glitches: Players on Fortress will no longer be falsely detected as "outdoors" while navigating the 2F Courtyard Corridor.
- AI Improvement: In Co-op or Training modes, AI Operators will no longer get stuck at the base of long staircases when trying to pick up the defuser.
- Gadget Interaction: A critical bug on Kanal was fixed, where EMPs failed to deactivate metal detectors in 1F Reception. You can now push quietly again!
- Audio Fix: Missing weapon handling sound effects when performing a melee have been restored, improving the overall sensory feedback of combat.
Summary: Y10S4.2 Balance Table
| Element | Old Value | New Value | Verdict |
| Thorn Trigger Time | 2.9s | 1.35s | Buff (Faster kills) |
| Thorn Max Damage | 180 | 125 | Nerf (Less overkill) |
| Echo Yokai Count | 2 | 3 | Buff (Better intel) |
| Capitão Burn Time | 10s | 13s | Buff (Area denial) |
| Jackal Scan Range | 8m | 12m | Quality of Life |
Adapt or Be Eliminated
The Rainbow Six Siege Y10S4.2 update focuses on responsiveness. Thorn’s traps are faster, Echo’s intel is more abundant, and Jackal’s tracking is more comfortable. The return of the Super Shorty to Mozzie signals a return to a more "utility-heavy" roaming meta.
As you jump into matches this week, keep your sentences short and your comms clear. The new Thorn traps will catch you off guard if you are used to the old 2.9s delay. Stay sharp, and use these 15-second debuffs to your advantage.
Frequently Asked Questions (FAQ)
Does Thorn’s bleed effect kill you?
The bleed effect works like a "slow poison." This can lower your health over time. It also makes you very slow for 15 seconds.
Is Mozzie’s P10 Roni still better than the Commando 9?
With the return of the Super Shorty, the choice is more balanced. The P10 Roni offers a higher fire rate for headshots, but the Commando 9 provides better sustained damage. Since you now have a shotgun for utility, you don't need to worry about "destructive capability" in your primary.
How do I counter 3 Yokai drones?
IQ and Solis are now more important than ever. Additionally, Brava can hack the Yokai drones. Hacking 1 of 3 drones is good, but hacking 2 can turn the Defenders' own intel against them completely.
We hope that by now you have a clear idea of how the game is changing. However, what you still need is an account with premium skins. You should check out the exclusive deals on Rainbow Six Siege accounts on our site. Moreover, our site also offers R6 credit at a very affordable price.
