I haven't played the first game so I can't compare. Enemies have attack radii so you try to avoid it or, for enemies with different attacks, aim for the radius you want. You also can destroy different parts of enemies and get different drops for doing so which means where you attack and how you combo will effect that.
Yeah I saw the attack radius thing, and I'm not sure how well that works until I'll actually try it. From the vids I've seen it looks like the enemies don't move or move very little, which'd make some battles kind of boring.
Here's a short vid of first game:
http://www.youtube.com/watch?v=Id3DC2LakHc Same general idea, but no moving around and just based on the initiative.
Then again you really shouldn't be able to mosey into an enemy base on 2fort and grab the flag without seeing a single turret or guard.
I'm not sure why, but I just can't enjoy CTF in TF2. Maybe it's TF2's CTF mode that's boring, maybe it's the maps that aren't great, or maybe I've had consistently bad games, I don't know. It's just nowhere as good as CTF in UT99, the game that introduced me to the CTF mode. Perhaps there's really nothing out there that can match the thrill and adrenaline of CTF-Face.
As for bad players, bloops like what you mentioned happen occasionally, but then again that makes one side win the game in a flash, teams rebalance, people ragequit, new people join, and the situation normalizes more or less. In any case, imo that's much less annoying than being stuck on a team with, say, 4 snipers and no medic.