The thing is, if you put in Howard then suddenly the questions start again: Who is the Detroit goalie? Is this a timeshare? Is it a 1a, 1b situation or is Howard still the backup? I think Blashill is showing great poise and judgment in allowing his goalie to work through a bad day. He knows what the consequences would be of throwing the goalie situation back into doubt; instead, he's making a statement about who our #1 goalie is and that he has confidence in his ability to figure it out. I like it. It's a bold move.
Was that Pasha's goal?
If we use that mentality, is there's now a question if Rask is truly Boston's number one? I don't think so. You dress a back-up so you have a goaltender that's having an off day, they can be replaced. Sure, the situation in Detroit has been tenuous at best this year, but I don't think pulling Petr after giving up five goals on less than 20 shots means that you're questioning his starter/#1 status.
Also, I don't think just because Petr is the number one it doesn't mean that we don't have the right to criticize an off game.