I think Morris can do ok at Arkansas longterm. As others have said, they probably won't be great next year just because they are switching from a power to the spread. But long term a "finesse" game is probably better for Arkansas.
The power style was the worst possible idea for Arkansas to do as far as metagame decisions go (and that will be the case until one of the traditional SEC West powers of LSU, Bama, and Auburn falls goes into football hibernation). Arkansas is a fairly good recruiter relative to the rest of the country, but it's a below average team as far as the SEC is concerned and is almost at the bottom of the division.
Bielema was trying to out-bama bama when they weren't recruiting anywhere near elite level. A good coach could definitely make Arkansas a good program, but they are never going to have a team that can run the table against the SEC West when they're playing the game the way everyone else does, just everyone else has the horses to do it better.