If we're visiting fairy tale unicorn land, I'd love to have Kliff as a playcaller. That said, I think both sides recognize bringing him to Texas would create a "too many cooks in the kitchen" situation with Herman. I'm sure each of them are convinced that the one true path to perfect college offense runs through him, and neither is particularly interested in having the other tell him what to do. If there was some way to bring him in to execute Herman's offense, then yes, please.
As far as Beaty goes...I guess he'd be better than Tim Beck as a playcaller? He's a plus - maybe even elite - recruiter, but is he actually a good coach? I'll admit I'm not an expert on him, but there's nothing about his track record that's particularly impressive. I think we can do better, though I'm hard pressed to think of a name. I wouldn't be horribly disappointed if he was the pick, and he might be acceptable for a year or two before he moves back to head coaching at Southwestern Who Gives a Fuck State.
Ideally, I'd like to keep Beck on staff; his Arizona connections and oft-overlooked skill as a recruiter are a huge plus. I also don't think he's completely terrible as a coach, and him in a nominal co-OC role with zero playcalling input functioning as the WR coach wouldn't bother me at all.