About 2 months ago I did a refresher class, I had'nt dived for 1.5 year and I wanted just to be sure of my game. I did the pool session with the rental gear and every time we did an OOA drill or gear removal I was critized by the instructor that I should "NEVER remove the reg from my mouth, or remove it AT THE LAST MOMENT". I let it go and did as he wanted. But later on I was think of what he would think about an OOA with a longhose, you need to give your primary. And seriously, if I'm OOA, what would a none working reg "HELP" to be in my mouth?
To the OP, try the long-hose route, maybe you'll like it. Buy the hose online if you like, since most dive shop "RAPE" you with hose prices. 50-55$ per hose is kinda expensive for a hose available online for 35$