When Doc goes small, I don't see how playing Courtney Lee at SF is ever a better option than a Pierce/Green forward combination.
So I wouldn't like it to be part of the regular rotation.
You're certainly right in a playoff rotation, but assume these things:
1) We want to keep Pierce's minutes at 30 or less in the regular season
2) Green proves to be more valuable at the 4 spot than Bass, since Green can also shoot open jumpers well and Bass really doesn't provide much in the way of big man skills (rebounding, shot blocking, size).
3) Sullinger doesn't light the world on fire right away.
Under these circumstances I could see something like this for the regular season, if not extending at a somewhat diminished rate in the playoffs:
SF-Pierce 30 mpg/
PF-Green 28 mpg/Bass 20 mpg
Now you could give Green another 5 minutes or so at the 3 spot or you could play Green a little less at the 4 and a little more at the 3, but the point remains that in this scenario there appears to be at least 5-10 mpg (if not more) for Lee to get some minutes at the 3.
And he's certainly a better option than going to whatever other wing options we come up with.
And I know people hate this point, but I think it has some truth: I don't think the C's just traded away last year's first round pick (despite his underwhelming performance), some other pieces, and agreed to pay Lee 4-5 million a year to have him play spot minutes.