Arteta shouldn't be a viable candidate. We aren't a halfway house. The next manager should have managerial experience, PERIOD.
But again, the D of F needs to come first. They have to decide on some concept of a team with Board and be left to do his business. Give him a staffing budget and allow him to set up a proper sporting structure for the club. Maybe Walsh current has one, who knows.
I still like RBL's model. They've got Ralf Ragnick as its overall sporting director across all its teams (including Austria and RBNY), but RBL has a chief scout, an individual sporting coordinator, and a head coach/trainer in Ralph Hasenhüttl. The sporting director hires the head coach or in their case, the trainer. To me, that makes a ton of sense. In fact, I'm not sure why we are so obsessed over having some big name head coach. I know its the EPL and there are massive salaries and egos, but we should be finding a coach that philosophically agrees with the type of football we are trying to play most importantly.