Lysa's not as ugly in the show as she is in the books.
I don't think they'll bother with Barristan's disguise in the show, just have him change his name. WE'LL know who he is but Daenerys won't.
he'll have grown a beard by then to of course give rise to the name Whitebeard
it's not like he'll have to wear Groucho glasses