The way I've always seen it, and the way I was trained, is to evolve your own equipment configuration. What works for you isn't always what works for another diver. DIR definitely has it's merits, and parts of my configuration are Hogarthian and DIR. But by trying to standardize equipment for all tech divers, you're only going to create problems.
As tech divers, we're all traineed to be self-sufficient. That doesn't mean we always dive alone, or that we'd refuse the offer of help in an emergency. It does however, mean that my gear setup doesn't have to be exactly like yours for me to be able to help you, or vice-versa.
My gear configuration has evolved over the past 8 or so years that I've been involved in tech diving. I've taken parts of many different diver's configurations, as well as innovations of my own, and incorporated them into a gear package that works for me. What works, works.
But I'm not going to try to ram my configuration down your throat. Just because it's right for me, doesn't mean it's right for everyone. And there lies the inherent flaw in the DIR system:
Not all divers are alike, therefore not all divers equipment setups should be alike. If you wish to dive DIR, great if that's what works for you. But if it's not right for you, don't feel like you can't setup your gear differently.
Tech diving has reached the point it has, and tech gear has evolved as it has, by divers trying new things, and configuring their gear to meet different requirements. Your rig should always be evolving. When we decide that this or that is the absolute best and can't be improved upon, our sport will stagnate, instead of moving forward.
I've nothing against DIR or it's practitioners, I just choose to do it my way. So please, DIR fanatics, don't try to force your views down my throat, and I'll stop writing these long-winded tirades.
Thanks for letting me put in my 2 cents worth.