I was the last person and he said I was doing it wrong.
This is a common tool that sensei's use, he didn't set you out of the bunch explicitly because YOU did it wrong, but more likely that he wanted everyone to try it before he began to give his 2 cents. He probably noticed that everyone was doing it wrong.
On the other hand, you should do your best to swallow your pride and listen to him/her. Aikido's definition of "control" is a lot more specific than in many other arts. It sounds as though he was critiquing your control, and relaxation more than your ability to project your ki (which btw I loved your examples of use in CMA, very enlightening).
When I first began at aikido kokikai, i had experience in TKD, Judo, and Jeet Kun Do, and i thought i was perfectly controlled, only after months of training 5 days a week as a an uchi deshi did i find out what control i was lacking.