I would've agreed with you much more readily a few weeks ago.
But if what you say is true, why isn't this team thumping opponents in the pre-season? If the talent is so overwhelming, you'd expect our guys to dominate other teams (who are going through their own playing time issues as well).
It's not "overwhelming." I didn't mean that any group of five players on the roster can whip other teams. I meant that if the best players are used the most, the specific combinations of players probably isn't a big deal.
Roy didn't play last night and Portland lost by three to Utah. I think Roy should get more minutes than 0 when the games count.

I assume/am hoping that Oden and Batum will get more minutes than they've played in the pre-season.
But assuming Roy, Miller, Aldridge, Oden and maybe Batum get starter minutes, does it really matter if they are all called one unit, or if Miller/Oden play a fair amount of minutes that don't overlap with Roy/Aldridge? Or if Webster plays minutes with the "starting unit" while Batum plays a lot with Oden, if Batum is getting 30 minutes per game? My guess is that it won't be hugely impactful, but I could be wrong.
An interesting result of statistical analysis in baseball is that lineup construction doesn't have a big effect on runs scored. You want to hit your better hitters higher in the order, because the higher in the order, the more at-bats they get over the course of the season...but for any specific game, you could pretty much toss out a random ordering of your starters and get largely similar results.
Obviously basketball has one big difference: you can (mostly) control how much each player plays in the game...so, I think that matters, minutes per game for each player. But for the same minutes per game, I really wonder how much specific combinations of players matter. I get the arguments for offensive dynamics (pair a sharp shooter with a big man, etc), but you can find pretty solid reasons to like a lot of different possible groupings on this team.