I think I like most of the changes. In reality it appears that the smoker damage from the tongue isn’t that much, but it feels good to at least HURT someone once in a while. The balance to the hunter claws diminished the “run in and slash” technique, but I honestly think they intended that as a secondary attack anyway.
I have noticed that the Smoker targeting recticle now lights up when you can actually pull someone, instead of whenever you have partial line of sight. Targeting in general (at least with the Boomer) feels a little off, but maybe that’s just me being over critical looking at the changes. I also think that hordes are a little harder to just melee off than they were, which I think is a good thing all around.
I’m still undecided about having Tanks/Witches at the same percentage traveled on the map. At least in the 2 matches we had to night, it seems to more heavily favor the second group because, if you’re all still alive, you know pretty much exactly where the tank is going to spawn. That allows you extra time to go and look for supplies because you KNOW you need them to get past it. Witches seem to spawn in slightly differently places, probably because they just appear and stay put, as opposed to tanks who tend to rush you. 
I think I take the care for “dumbest Hunter moment” in our match tonight. We’re sitting up on the roof of Mercy 5 and the survivors through a cocktail up. Fire doesn’t hit anyone, but as I joke I say “I’m a flaming hunter” and, pretty much at the same time, proceed to pounce right into the fire! I died before the survivors
came up, but at least we were all dying from laughter!!!
On the subject of picking teams and balancing, I think the SDMB community is a great bunch. Even tonight, where it seemed to be one-sided at first and we went back to the lobby, everyone was good natured, talked it over, and we kept the same teams. I have to say, I’d rather be on an under-balanced team with SMDB’ers than most pubby games I play in. It’s nice to just play with 8 people who want to have a good time playing and not frantically worrying about the “Best tactic” for everything.
I had a discussion with a friend at work who’s been playing L4D as well. He said he’d gotten like all but 1 or 2 achievements. I was amazed because I’ve got all but about 10 or so and I think I play a lot. I asked him about some of the harder achievements like never being healed, No one takes special damage, etc… and he said “They are easy…just play on easy with people who can survive on expert.” When I heard that, it made me think about whether it’s really an “achievement” if that’s how you get it. I mean, I know I have the one where no one gets damage after the rescue vehicle is called, but I got that on a bug (joined right after the final tank died) but I openly tell everyone how I got it.
What do you guys think about those kind of achievements? I’m beginning to think that many of them should have a “Level acquired” attached to them to distinguish between those how really EARN it and those who just go play on easy.