The bugs introduced through the first deployment of Year 2 content to Rainbow Six: Siege likely wasn't the start they, or Ubisoft, were looking for. Thankfully there's a patch coming today that should alleviate at least some of those worries.
Judging by the size of the patch notes delivered onto the Ubisoft forums, people's worries were not misplaced. A lot of problems have been squashed with the new patch, but there are still cries within in comments of others remaining in the game.
While some are likely a little more complicated to fix - like triple-screen monitor setups suddenly being incompatible with the game - smaller, but just as problematic, issues like certain keyboard buttons being ignored by keyboard rebind efforts ultimately need just as much care and attention as the various character-specific issues outlined - and fixed - in this massive patch. The patch in question is far too large for us to detail on this page, but we'll give a quick mention to some key fixes issued to the Operators introduced in the Velvet Shell DLC release earlier this month.
On top of those character-specific fixes, 'High Impact' fixes include players no longer occasionally being spawned with the PoV of a far-away camera, players being able to melee objects on the other side of the wall when Mira's OWN is placed and, most importantly, the Diamond weapon skin being unavailable.
There's a lot to read up on over on the Ubisoft blog, yet many are still without fixes for some of the problems plaguing their individual playstyles. It's a good start to a long list of problems that shouldn't have surfaced; but it's still too little too late for some.