You guys know that the VAST majority of SWAT teams in this country are regular beat cops with extra equipment in the trunk, right?
Most smaller departments just take some percentage of their force and give them some extra training and equipment and then put them back on patrol. When they decide to call SWAT, or do a No-Knock, they just call up the SWAT trained officers that are on shift and go. That's at least half the reason SWAT teams tend to be so poorly trained.
I'm getting to the point where I'd like to see no cities have SWAT teams. Let the County Sheriff have one team, 5 or so guys, that do all of it for the whole county. And that's all they do. Train, burn ammo, and be on call. Yeah those 5 guys wouldn't do much, but when they had to do it for real, they'd be good at it. And less likely to set houses on fire or char babies.