Monroe could end up being the best of the 3 though. I really like our big team. Negotiate with Monroe, give him the max if need be. We already have Jennings and KCP, who could end up being good, and is certainly athletic enough to end up fitting well.
Winners pay their good drafted players, not trade them away for a position that isn't as despitute as you think. Chauncey can be a serviceable or better PG until KCP or a future drafted player is ready to step in with Jennings, Smith, Drummond, and Moose.
Monroe could be the best of the 3 maybe, but I doubt it and the Pistons doubt it too. They are incredibly high on Drummond in particular and would gladly part with Monroe over him if you put a gun to their head. Josh Smith is an athletic freak who blocks shots and rebounds with anybody in the league. Remember the knock on Monroe is his defense, and getting burned by the better PFs in the league. Against the Wizards, the Pistons were outplayed badly when it was just Monroe in by himself.
Chauncey is on his last legs, and he's been plagued by injuries as he ages. I don't really think you can count on him to be any sort of savior, but you're right he will be serviceable as long as he is on the court. KCP does not look like he will become any sort of star player, but he could become a solid role player. He seems more like a good piece to have around an already built team instead of the other way around, but it's early on him of course. Jennings I have to wait and see on. He could be a great player here, or he could just be another chucker. I never watched him play a whole lot before he came here so I don't know how to assess him yet. Bottom line to me is we could use better wing players overall and especially need a good solid 3 man.
And certainly winners trade their draft picks away if it's beneficial. The Boston trade for Garnett comes to mind for one. They traded Al Jefferson, Ryan Gomes, and Gerald Green (all Celtic draft picks) along with two other guys for KG.