I was incredibly hopeful when reading the patch notes, so many problems seem to be fixed. But of course, as soon as I start the game, most of the supposed "fixes" aren't fixed at all.
My first two Hardcore Co-op matches, I had a Molotov thrown at me before the insurg even knew I was there, so much for the "line of sight" fix. An insurg also set up some sort of ricochet grenade system and somehow managed to bounce it off three walls, into the downstairs room and kill 80% of my team, so much for the 10-20% drop for grenade accuracy, sure it wasn't a boost??
You also mentioned "Known Issues" on your update post, yet nothing mentioned AI improvement, nothing was fixed, and I assume it never will be at this point. The AI is still bending bullets round corners, penetrating sandbags, with AK-47s, still insta-killing with superhuman reaction times, and one shot kills which shouldn't be possible with their ammo type. Please, instead of making new guns that have no effect on gameplay, creating new maps and game types (which just create more and more bugs to be fixed), focus on the stuff that needs fixing and balancing.
I can't speak for other players, but if these issues aren't addressed In the next patch, I won't be playing this game again. It's simply not enjoyable anymore. Here's to hoping everything works out.