This is a horrible idea from the standpoint of quite a few things need to get ironed out among this team and this isn't a way to do it.
First, the defense needs an opportunity to gel. The defense is going through a complete overhaul and needs time playing alongside actual starters for a chance to learn in an actual game setting. The LBs especially need a chance to play alongside each other and not some 2nd and 3rd stringers.
The offensive line needs time to gel. The scheme in which they block has changed which is a huge thing in itself. Moreover, the offensive line will always need time playing alongside guys they will starting with.
I could go on with this, but you get the idea.
I know Bo is getting at the idea he wants to let the kids have fun, but this coming Saturday isn't exactly the best time considering what we need to continue to work on. We only get so many spring practices and right now we need to use each of them wisely. Especially when you consider where we are at defensively.
I'd personally prefer 1s versus 2s over this format.