I feel Frankie had it worst in "Imposter's". She deserved that night off, and not only did Herriman take it away, she was mocked and made to work harder that night. No one understood the emotional turmoil she was going through, so she felt misunderstood and horribly taken advantage of and used (which she was). And the last straw was when everyone went to the very concert SHE had been so looking forward to without her. I guess I've also kind of been there. It's very depressing and discouraging, and sometimes the most you can do is have a good cry and muster up enough courage and strength to continue on. I really felt for her.
As much as I love Mac, I didn't dislike "I Only have Surprise for You" as much as it seems many others did. Mac is strong, and has a good sense of humor, and although clearly not wanting to be made a fool of again, he has no problem shrugging it off when it does. And I thought Bloo was pretty genius to think all that up himself and get the whole house (minus Ed) to join in, although I agree he definitely needed to be smacked for being so mean.
But Mac made it through just fine. It just goes to show that Mac, too, can misconceive things.