The people in the know did give technical feedback, but they did it one abstraction level above the one you're working on now.  Didn't you see this thread?  The bitcoin maintainers came out of the woodwork to say "no, stop, this is a terrible idea."  retep even compared mastercoin/dacoinmeister to BTCST/pirateat40.  The message is unified and clear: do not implement Mastercoin, these ideas are all deeply flawed.