Calm down Max.
This is, after all, a work in progress.
I like your idea that deflecting shots incurs some amount of mishap penalty.
I don't like the idea of using a power attack/attack fake to do a manual reflect: that's even harder than the current system (using the tap-fakes). I've used it successfully, as far as I'm concerned it DOES work.
I do agree that it would be nice if the manual deflect was automatically targeted, instead of having to aim carefully yourself.