Not sure you'll find that it's Jekyll and Hyde. When it comes to MIL's assessment, have you considered the source? She wants him to be "OK" and so, she sees him as "OK". Never mind that inside he's a raging mess. She's not looking for that.
Work? What were his choices again?
The thing is, you wouldn't be happy if he was miserable. If he fell apart. You'd feel vindicated perhaps, but not happy to see him suffer. Be careful what you may wish for, right?
The "Mask" is very appropriate, Shining. Some would argue he's been wearing a mask most of his life and it recently slipped.
Why is MIL telling you that he looks great? That seems a little off to me?
AJ
"Our lives begin to end the day we become silent about things that matter" MLK Put the glass down... "Yesterday I was clever so I wanted to change the world Today I am wise, so I am changing myself."
She wants him to be "OK" and so, she sees him as "OK". Never mind that inside he's a raging mess. She's not looking for that. 
