I'm not getting to caught up wit the pg/sg labels in this situation because of the size and skill sets of JJ, Copeland and Taylor, I think you can call it a G/G/G//C... lineup if you like, it's only on paper. I see Cope as a 1 that can play 2 (maybe some defensive 3) and the same with JJ (Maybe some 3 in a small ball lineup). I see Taylor as a 2 that can play 3, Lands a 3 that can play 2 (although with all the other height you could let him move to the 4 in a small ball lineup).
I don't know if Copeland would play the 1 ahead of JJ to be honest, nor Taylor ahead of him at 2 (some hella competition right there), but JJ will play... he's a swiss army knife and will make others play better when he's in, wherever he's at.
I think minutes will not be as plentiful year 1 for one or all of them, but year 2 your talking about a stud guard rotation with a Copeland, JJ and Taylor. Other then small nuances in there games, you literally lose nothing with whomever is in.
We talk a lot about the Dion and MCW roles, one of these guys will have a legitimate shot of using those roles as models.
I could be wrong on all of this though...