Just to be clear...
It doesn't appear to me that Holl and Gus have actually left the team. It appears this was a paper transaction... probably in order to:
1. Create roster spots for MBN and ASP for a 9 game tryout for each
2. Create cap relief. By burying those contracts Steve gets a little extra acrued cap.
Steve was probably going to make this move regardless of how MBN and ASP played because of reason 2. The extra roster spots this created is a bonus. And with JVR out as well, might as well see what our top 3 rookies can do through 9 games and then reassess.
Gus and Holl will prolly get reactivated if Steve decides to send any of these 3 down. That will obviously depend on how they play, and also how Todd plays them. If the rookies end up with low minutes at all I can see SY sending em down just to get more gametime for a while.