Thanks for the thoughts, guys. There are a lot of things to try. I certainly don't want to make it less fun for the regulars, I just feel there are always improvements that can be made, especially in a mod environment.
I think there should never be a point when it's totally pointless/hopeless for the humans. Say the human team is hit hard right out of the safe room, spitter points are racked up and what not... now the infected team is well on their way to 4 tanks eventually. So it's already like, shoot, let's just lie down and die. In that case, the tank mechanic exacerbates the skill disparity between the two teams.
I'll continue to overthink and say that I'd bet the infected win the majority of the time on the server, and by a significant margin, simply because of the tank mechanic. And frankly, I think it's best when each side has an equal chance of winning, all other things being equal (which they probably never are). Now, maybe everybody likes the status quo, because tanks are fun to play. And the sentiment I've heard of, "If you don't like it, gtfo," well, that's partially warranted I suppose lol.
So, I've said my peace and won't whine about it any more.