I think Diamond's kool-aid is strong. One of the best tricks to make people think what you're doing is the right way, is to speak as though the short comings are improvements or features. At one time, at least in NA, Gold Crown was the defacto standard. Diamond came along and built a better table. Along with it they altered other aspects that consumers just ate up as "what it's supposed to be", since the rest was an improvement. Now we're here.
Fortunately for professional pool, MR isn't a NA entity. So beyond logistics and NA brand recognition, they aren't married to Diamond at all. Once MR's brand becomes strong enough in NA and they aren't bound by logistics. My hope is we can eventually see a Diamond model that adheres to an international professional standard. Not just what Diamond has been touting as a "pro-cut" table.
All that said, it sounds like I'm anti-Diamond. Truth be told I've never been a big fan of how they play. However my bias in favouring Rasson is solely based on recent performance on the biggest stage, and wanting consistent specs. If the tables played the same but Diamond had been down the side, then I'd be calling on Rasson to tweak their build to match.