If Potter goes, it's not just the manager - he's bound to take his team with him (Reid, Hamberg, Macauley). We'd be looking for a whole new coaching set up.
By far the best option out there IMHO. Amazing attacking football, similar journey in Japan as Potter in Sweden, transformed Celtic, many of their older fans on forum saying its best football they've seen in their lifetimes, great with youth , may jump at chance for PL and on a 1 year rolling contract right now.