I don't think we have two mle holes... Look at our rotation last year in the playoffs:
Starters - Rondo, Ray, Pierce, KG, Perk
Bench - Sheed, Baby, TA, Nate
This year we will have more than likely:
Starters - Rondo, Ray, Pierce, KG, Perk
Bench - MLE, Baby, TA, Avery, and maybe Erden for foul trouble
Maybe we use Sheed's contract... There has been no word as of late that the C's are even considering that. The MLE will definitely be used on a big guy to replace Sheed and fill in for Perk at the beginning of the year.
As for Avery I don't see Monte, but I do see George Hill. I think Rondo and Avery definitely have the potential to be a Tony Parker/George Hill combination where Rondo starts like Parker does. Avery backs up Rondo like Hill does Parker and then there are times they play together. The Spurs this year played Hill and Parker a lot during crunch time together.
The pick is a good move because Rondo will suffer injury at some point with the way he throws his body around and having Avery could prove very important if that were to happen.