Been playing Insurgency since when it was a mod and then the 2014 with about 700/800h on both combined and some 2000h on other shooters like R6 Siege, Squad, Ironsight. So I'm about 14h into the beta and there's not much positive I can say at this point as way too many things break the immersion for me. Without any order, here are my pain points.
Hit registration is simply broken. Due to this the game is unplayable on PVP and just frustrating on Coop. Shots simply don't register even at point blank range. I've seen a few comments on the forum saying the servers are probably overloaded as it wasn't this bad for the Alpha phase but you also knew the rough number of people you could realistically expect to play so not having servers up for this just tells me you may adopt the same approach on full release.
Shouting everywhere. Yelling out when you're being suppressed is fair enough but when you become the last man standing and you yell "where did everyone go?" ... how is that realistic? I'm surrounded by enemies and now I'm screaming out? Breaks the immersion for me. This needs a serious tone down as this kills the organisation needed for competitive game-play. The player needs to be in control of the sounds he's making or any tactical advantage he has just goes away randomly.
Vaulting does not work. Sliding on walls because I wasn't exactly aligned with the vault .. it's in a sad state.
Radio Spam. The amount of team mates I've had to shoot in the back of the head due to incessant radio spam is a bit too high. We should just have an option to mute a player completely. All those team kills are on you for not implementing the most basic of features in a FPS past 2010
Aim down sights just feels slow. Almost as if I'm 80 years old and in a gun fight. These are warriors not retired bus drivers who never picked up a gun in their life. It should not take them a full 2 seconds to aim down sights, specially slow for anything over 2x scope. I play airsoft with full metal replicas and even for me, a couch potato, the timing of the ADS is just ... off. Feels like you're trying to offer the ironsights guy a bit more time when meeting a 3x/4x opponent. Breaks immersion.
Grenade throwing physics ... have a look at any other shooter please. It's like I'm throwing something like with very high wind. Also, underhand throw can't clear the smallest of walls. 2m high? Can't lob a grenade over it ... but I can straight throw it down the street! Make this consistent please. Squad is a good example on grenade physics done right.
Flash grenades 100% blind you and instantly disappear when their effect is gone. There's no gradual come back from a flash, no gradual affected if you're a bit away from it.
Unlocks - Really? Unlocks? the best thing about insurgency was the no-nonsense of all other typical shooters. You're trying to appeal to a larger player base I get it ... just doesn't appeal to me.
Bots are all on roller blades! Bots will just fast forward to the next location and when you combine that to the broken hit registration makes them borderline impossible to hit. Breaks the immersion again.
Bots wallhack. Flat out bots are shooting at people before they can ever see them, specially so through smoke. Feels like the AI on them got about zero polish and was just reused from some old school title like quake 3. Also bots just spam frags, RPGs and grenade launchers. If this was intentional to keep the "challenge" up with a lower amount of bots, then you need to add more bots and make them realistic. Yes, this eats up more CPU on the server but it's a far better experience for the player.
Bots just randomly spawn behind you with scripted triggers as if this is a single player COD. Suddenly that house that you just cleared has 5 guys inside it, behind your back. Just not interesting and again, immersion breaking.
Bots are clueless until they 180 snap and shoot you in the head. It's not very consistent. Bots seem to be on a random trigger to become murder bots. They stand in front of you completely clueless for a random amount of time until they become the terminator and 180 no scope you. Please give this AI some love, make the skill level consistent and possibly add levels of difficulty.
I've probably forgot something but I guess this is good enough to start with