I'm not judging yea or nay on this, so i'm just going to post my thoughts out loud as I look:
The PER of the starting five from 1988-89: 23.6, 17.7, 16.6, 14.6, and 13.9
The PER of the starting five from 2012-13: 20.4, 19.7, 16.4, 15.7, and 14.1
Buck Williams replaced the 14.6 (with a 14.3 in 1989-90); RoLo replaces the 19.7 (with a ??.? in 2013-14)
1989-90 Starting 5 PERs: 22.2 (heh, Clyde), 20.0, 15.7, 14.3, 13.3
2013-14 Starting 5 PERs: ????
LMA needs to get more efficient, Damian needs to get way more efficient, but everyone else can pretty much stay put in order for us to be on par with 1989-90. As an aside, Duck was righteously inefficient; RoLo doesn't have to do much to exceed Duck's impact on the game, or Buck's for that matter. I guess the point here is fit. Buck fit with the team much better than Kiki. RoLo might (??) fit with the team way better than Hickson. If Damian steps up his game a lot, either by opportunity because defenders will have a harder time or by sheer force of skill, everyone else's impact goes up too.
Are we a "single piece" away? Who the hell knows. I can respect the opinion of "heck no" given how little we've improved in the past couple of years as a team. At the same time, maybe some players added to our mix that fit right are already on the roster, and we'll see that improvement that comes when the dice fall right, and the sum is greater than the parts.