Jeebus, that would do it for anyone!
I was cured of that when partnered with a 120kg 6'2" bouncer. I attempted to overcome the added weight of his forward angle by clothes-lining him as hard as I could. I was upside-down a moment later, and he slammed the **** out of me.
Yes, it's all about adjusting as the situation develops rather than imagining one finishing move is going to end it all right away.
Like BKR says about the leg being insurance, I think the same applies to any of the wristlocks too. If you aren't already in a winning position by that stage, you should be concentrating on getting to one instead of trying to force a finishing move.