This thread is kinda old, so I don't know if you are still concerned about big hands from EP, but I will weigh in anyways.

I would suggest adding more low PP's rather than the Ax's. The lower pairs are usually a lot easier to play, especially OOP. As long as noone is 3betting you too much, and you aren't getting owned postflop, you should be profitable with them even UTG. Plus, you will be raising a larger % from EP.

This allows you to force people to no longer just play for set value vs. your EP raises, because you rarely have a hand that will be stacking off unimproved. Your opponents will not adjust properly, and you will profit because of it.

Fnord wrote in a different thread something to the effect of why add more weak hands to your range for a certain action (I think it was cold calling on the button) when you can add more strength. I would personally take 22 over A6 from UTG at low stakes any day.