I'm with Raggs on this
Dai's mantra has been that he'll only sign the right person for the position that he thinks needs filling.. not someone that is looking for a job next season (is Gleeson looking for a job and RP know Wasps are looking for a coach and put 2 and 2 together).
I'm guessing it depends on what role would be filled.. it certainly won't be lineout, scrums, rucks etc.. but those 3 elements all link with attack and defense so any incoming RL coach is on a steep learning curve to get their tactical head around the core difference, which is competition for the ball at the tackle/ruck area.