Actually upon reflection, I wouldn't be horribly against him being in the squad, just to cover all bases if nothing else.
Henriques' tour to India was nothing short of a success if you ask me. Yeah he didn't perform across the whole series, but it was his first series, first time playing long form cricket in India and his stocks rose (a sneak peak of an upcoming thread I have in store) as a result.
However, like n00fers n00fan said, I want Australia to have a make up of 6 best batsmen + 4 best bowlers + wicket keeper at 7. MH isn't in that framework at the moment.
His Indian tour will be nothing but good for him in the long term, and on a similar tact I wouldn't be strictly against him touring England but he wouldn't be in my XI for any of the matches (exceptional circumstances aside).