I just realized that Avatar has no way to communicate telepathically, which is a little strange considering he can read people's minds. I'm not sure how often this will even come up, so, rather than editing the character again, my plan is to power stunt the Communicate (mental) effect when Avatar needs to do it.
Once we gain some pp, I'll add it as an Alternate Power of the Telepathy array or maybe get rid of the Sensory Link extra on Mind Reading and add Communicate (mental) instead (if that's OK).