iowalongs can probably speak to how it changes their team.
From what I've heard, Montes is more like a 4 and would move from center to forward. Issa would slot in at center. Montes seems to be a streaky shooter, but can hit the threes. They would lose quickness on the defensive side with that lineup.
Personally, I would start Issa and sub with Montes since he can be foul prone.
Can't speak to Neyail, don't know much about him. I'll say adding Samake will make GVC that much tougher.
I do have some concerns about how these kids are getting there...but that's for another discussion.