Well, you brought up a good point though, wouldn't make sense for Slade to train Shade if Shade treated him like crap. Slade's not stupid. Plus... yeah, the characters would be so much older now.
I guess it's up to Bron since it's his RP, but after thinking about it, I honestly feel a new Teen Titans would not only be easier to work with, but Bron wouldn't have to try and continue from where the last one left off, figure out a new storyline to add on, and somehow have it make sense for new people to get into without getting confused.