I would say its definitely worth it to go see stp again.
1. obviously you're a huge fan otherwise you wouldn't be here.
2. I don't care what anyone says -- they still kick ass and are more than worth the price of admission
3. Who knows how much longer they'll be together (again)
4. ...and I may sound like an old fogey here, but going to see STP reminds me of my teenage years. For 3 hours, I'm not thinking of remodeling my basement or playing baseball and trains with my kid. I'm just in an audience, living up the moment and remembering all the great times I've traveled to see the band; screaming my head off like a little schoolkid because Weiland just looked at me! (in a manly way, of course)
5. They are, after all, fuckin' STP!