The weapons definitely need a bit more finess this time around. For example, I found if you spray a LMG no matter how perfectly you hold your aim you will land few hits, as if the game purposely reduces accuracy independent of where the weapon is pointed. However, if you rapidly press the trigger button you can completely avoid it while getting a similar amount of rounds out. BF4 rewards fine weapon handling far more than previous games, which is partly why I think some have problems with it. Admittedly some serious tweaking needs to take place. Also, weapons with no accessories are simply inferior to those with them. Even if the best players are going to have trouble with virgin weapons because I think the game purposely nerfs stability and accuracy. They are still usable to a good player, but a poor player is going to have a very tough time with them initially.
I agree with the spawn issues. I think they meant well keeping the spawns a bit away from the flag hoping to save some spawn camping grief, but in practice they tend to drop you out in the open and vulnerable, too far away from the flag to be able to sweep in at the last second and potentially counter the capture. I'm not necessary opposed to spawn camping in some situations because it is a strategy, but what I've seen is that some will camp know spawn lanes in spite of not owning the flag, preferring to take the kills than capture flags.
Also, IMO the small helicopter with the guns is really OP right now. It's quite possible that as a threat they will diminish as more players get AA weapons, but for now they pretty much own everything. In BF4 the helicopters are easier to fly than ever before and extra durable. We had a chopper gunning us down virtually point blank just hovering and shooting and we threw everything we had at the cockpit and he laughed us off. At least in prior games you had a chance to kill the pilot, but it seems like the glass is bullet proof now. I could be wrong about this so if someone has more info please let me know.
Lastly, the destruction engine is great but surface mapping is buggy. Stuff like getting hung up on doorstops or ladders that blocked me at the very top. I was killed numerous times because I got stuck some tiny piece of scenery. I hope they fix that.