Pushing people up further in the lineup is suboptimal for the future, though. Forget about Facundo, Ryder and Sealey are coming next year. Obviously, they can redshirt. Sealey probably will, but Ryder took a blueshirt year as a senior and the last three guys to do that were Nick Lee, Haines, and Kasak, and all three were high AAs from the jump as true freshmen, so it would seem that Ryder is probably ready to go this year even if he is forced into a redshirt. Next year, they have Duke and Henckel coming (as well as Asher Cunningham, who jumped several levels this year). Barr was undefeated as a redshirt last year and is poised to move right into 184. These guys are all in the 165-184 range. Unless neither Levi nor MM can make 157 anymore, moving Haines up into the 174 range just throws another log on the logjam that already exists. It's much better for the team if Haines & Mesenbrink can continue to hold 157/165 in some configuration.
Facundo can easily be replaced as soon as this year without messing with Haines/MM by Ryder (or Sealey) if he struggles as you are suggesting. I'm not convinced he will struggle, but just saying, if he does, there are plenty of options other than Haines.