Honestly, I feel like some people on this board view Tony Allen as their adopted child. Who cares if it's "fair" or not whether Finley takes his minutes? This isn't Little League: it's a professional basketball where adult men get paid millions of dollars a year to play a game. I think I can sleep at night knowing Tony Allen is getting paid 2.5 million a year to sit on the bench.
That said, I'm not saying it's necessarily the right move by Doc to play Finley over Allen; however, I think there are some merits to it. For better or worse, TA's game is similar to Daniel's in the fact that they both don't shoot well and are both slighter of frame. Finley offers just the opposite: he can stroke the three and has fairly good size (6-7 225). I think sometimes people forget that TA is on the smaller size for a shooting guard, let alone small forward (he's only 6-4).
Ultimately, both are vying for what looks to be pretty small minutes come playoff time. I can't imagine any scenario where Doc plays PP and Ray less than 36 mpg each (and let's face it, he basically does that now, so it's likely to be even more in the playoffs), so we're really only talking about 24 mpg of minutes available at the backup 2 AND 3 spots. There's really no reason that Daniels can't handle pretty much all of that.