I think there is merit in taking some things off Sark's plate like strength and conditioning, some defensive strategy stuff, self scouting stuff, etc.
Saban has built an off the field machine that supports the on the field machine.
If something like that is the vision and GP is a good fit, then I could see that.
I would be very happy with GP as co DC or DC for sure.
If I'm Sark, I might not be thrilled about GP's long standing relationship with my boss however.
Best I can tell, Sark has solid support among Hartzell and Eltife. I don't see why they would let a culture/personality "grenade" go off in their signature athletic initiative.
So if they are sold, then maybe the kinks have been worked out.
For a football GM role, I'd probably prefer someone from Sark's background with Carroll or Saban. I'd also prefer some defensive staff changes too.
Overall, I'm still in the camp that one year is not enough time to judge changes in culture and development which have plagued our program. Most coaching hires fail at this level, but I think it's too early to call it especially given our long standing culture and development woes.