Haag is a top bloke, but at present we have the best in Ian, so don't need him.
Unless you're more in the know than most of us (in which case, why not share?!?) but at the current time, the coaching structure going forward seems to be unclear (Stirling was pretty non-committal in his interview, Dicky said that Davis would become "Head Coach" IIRC). If as seems reasonable to believe, Dicky is correct, there's a good chance that a new forwards coach will be appointed, Haag's credentials seem pretty good for the job to me.
Whether or not he does get the job, I can't believe I was daft enough to read about Haag earlier and not put 2 and 2 together! Thanks OP.