No, neck cranks need to stay legal. The fighters are robbed of enough techniques as it is. We're not only talking straight neck cranks from the back position here, we're talking about the twister, last year's submission of the year. I guess the can opener could be classified as a neck crank as well although it's rarely used as a submission hold these days.
Rookie Hammer Squad 2015
Frankie Edgar - Dominick Cruz - Jorge Masvidal - Cat Zingano - Holly Holm