Realistically we need shooting. we're an oddly assembled team that made it work, but we need floor spacers.
I think it comes down to trading one of the following three: RJ, Randle, or Mitchell Robinson.
RJ played fine all playoffs outside of that last game, I think he turned a corner and he's worth taking into next season, and this is coming from a guy who was unconvinced he was any good all season.
But Randle and Mitch got exposed heavy, and I think it's really one of these two that have to go. If we keep Randle we NEED a stretch five, there's no way around it. Towns and Porzingis can both probably be had pretty easily this offseason, and if we sign KP we can use Mitch in a trade to upgrade one of the other positions. I think Myles Turner can be had in a trade too if we push hard enough.
If we trade Randle....I don't know where we can find a clear upgrade at, which is why I think Robinson is the player who is least likely to be on the team next year.