I see you found my similar thread... Yeah I downed a beer last night for courage and dropped Miller for Bernier. My wins will take a hit, but my GAA and SV% will lower a ton.
For you, I'd risk it on Markstrom. He would have been my second choice. He, like Miller, will get the majority of the starts, but not many wins.... However, I think Markstrom's other cats will be an nice improvement to the crap Miller's been laying all season long.
Good luck... And if you need courage to make this move, crack open a cold one!