I gotta say, it got me back into TF2 which is exactly what they wanted.
The unlockables I think mostly hurt the game, but that could be because soldier was my favorite class and they didn't get nearly as good stuff as the demo. (seriously targe?) I mean, I'm the worst demoman on the planet, but when I use the targe it makes me virtually invincible against all soldiers demos and pyros (which is usually 75% of the team).
As for the gunboats, I use them since I never actually use my shotty. And typically I don't actually fill my buff banner to use it (priority is kill, not survive). Plus, on mesa especially, there are several times where the rocket jump lets me get to that health pack faster and not really hurt for it.
Oh, and whoever says equalizer is OP has never used it. An auto kill means you're at <25hp with a luck crit (which yes happens more frequently at lower hp). Just try getting into melee range without being hit once. It's like playing spy without disguising or cloaking and you die from the slightest prick.