Wouldn't it be possible to do the same sort of methodology (flawed as it is, being based on PER and otherwise) with a Playoff rotation of 8 or 9 guys, rather than stacking the entire rosters?
How about this.
Top 8 players in each team's rotation. Take their WS / 48 and average them together. Multiply by 5.
Results
Cavs - Average .137 * 5 = .69
Hawks - Average .134 * 5 = .67
Raptors - Average .134 * 5 = .67
Bulls - Average .132 * 5 = .66
Wizards - Average .119 * 5 = .6
Heat - Average .116 * 5 = .58
Celtics - Average .112 * 5 = .56
Bucks - Average .108 * 5 = .54
Does that really work with teams that have seen so much movement between this season and last, though?
Um, I believe you requested a flawed methodology, sir.
The answer is of course it doesn't work, exactly, but I don't think it's entirely misleading.
I didn't even try to guess what the players' WS/48 might be this year, just used their numbers from last year.
For what it's worth, though, I did it based on the 8 best players on the roster for
next season, which means Toronto has Demarre Carroll, Washington has Jared Dudley, Milwaukee has Greg Monroe, and so on.