Hi Zack,
I'm sorry, but this is not going to change! The form directive is an part of angular that's not going away. Form handling is one of angulars core responsibilities.
You can't blame Angular for doing what it is designed to to ;-)
However, you might find that handling the validation with Angular is way less work then you might think. I have been where you are now, an opted for rewriting the forms to angular. Most of the work was in deleting obsolete code!
In my situation the code handling the forms was reduced to 20% of the loc. Think about that!
However, it is not that hard to monkeypatch your own angular into ignoring form attributes altogether.
Regards
Sander