Okay here's my breakdown:
Combat:
1) Jetpacks pretty much ruin the game. Once again, in NS's traditional fashion, the old creedo 'if the marines get to the endgame they deserve to win' applies en force. Jetpacks allow the marines to literally skip past every alien on the other team, to the hive, shoot it a lot, get experience, and come back and do it again, with even bigger guns.
2) Take the damn chair out of the pit in co_kestral. Honestly, no one likes lost, no one will like Kestral, for the exact same reason.
3) I want to devolve into a skulk.
Regular NS:
1) Skulks are like paper. Really now, I never noticed a fixed hitbox. Maybe it's because I've always aimed at the skulk. Whatever reason, I can kill three skulks with my LMG, down another with my pistol, whip out my knife and take down a fifth. You've seen me do it. Repeatedly.
2) Stomp, for the love of god, needs a range decrease. Okay, yeah, making it too short wouldn't be healthy for the onos. But he shouldn't be able to stomp people that he will NEVER be able to reach and devour/gore. The current range just makes it super-lame. Stomp should last one second, not have this rolling wave of doom that flows across the map and stuns the commander in the dropship that's circling another planet. I probably wouldn't mind the range if stomp's duration was proportionate to the range. At short range, you're stunned for a while. At long you're stunned very short.
3) Electricity is a sick joke. A sick sad joke. It's like Conan O'Brian cracking dead baby jokes on a tequilla bender. Not funny, sick, and sad, all in one.
4) Our comm spent all his res on turrets instead of giving us guns to kill the fade.
5) Onos is stupid. It went from an unstoppable, terrifying juggernaut in 1.0, to a weak as paper annoyance and outpost eater in 2.0, to a hit and run res whore wet dream in 3.0. Really now, bilebomb got a beef. Yay. Sorry, that still won't help the aliens crack open a marine base that has a TFac shooting bolts of lightning through a gorge's ass and killing the hive across the map while seven marines are flinging exploding sex toys around and turrets are blasting away at everything.
6) Jetpack/shotguns in good hands are still overpowered, aliens still have no effective way to counter HA marines outside an onos, and, well, basically the marine ENDgame is STILL overpowered. The only gameplay change was that instead of the marine early game being underpowered, it now is overpowered as well. In short, after playing about 90 bajillion games, seeing only four alien wins is just sad.
7) Really now, does anyone use a catpack? Ever?
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What pisses me off even more is everyone saying 'ITS IN BETA FFS!'
You realize how long this has been in beta? You REALIZE HOW LONG THEY'VE HAD TO FIX BALANCE!?! I mean, you know, if this was the product of maybe, uh, a month? That'd be understandable. But how many months has this been in progress? Any guesses? I can't remember, but I know it's been about three, maybe four months? At this point, balance should be rough around the edges, but largely in place. The fact that a solo marine (me) can kill keyser, fatty, and a civilian in one LMG clip while flipping off a railing like Chow Yun Fat is unacceptable.
I was half expecting a Valve logo to show up instead of 'UWE' splash screen.