First I've heard anything of the sort. The consensus has mostly been that Howard didn't want to leave at the deadline and would prefer to stay beyond this season.
Niyo: Will trade deadline spell Jimmy Howard's end as Red Wing?
I would imagine that's more of a "will be" than a "should be", but I wouldn't be surprised to see the Wings or Griffins sign another one year vet stopgap to play with Rybar next season.
I don't know that I would call Bernier "bad". Mediocre, Inconsistent, Overrated and Overpaid are probably better terms.
As far as "aging", sure, he isn't a young guy, but 30YO is pretty wide open for a goalie. He could take a turn down Bill Ranford Avenue and pretty much be done in the next year or so, but we've seen guys like Ron Tugnutt go from washed up waiver fodder to posting a career year and getting Hart, Vezina and AS votes at 31YO, Dwayne Roloson coming out of no where to post a career year at 34 and then be the missing piece that leads an underrated Oilers team to the finals at 36, or even Chris Osgood who was seen as washed up at 32 before putting up two Smythe worthy runs to the finals at 35 and 36. I'm not saying that could happen with Bernier, but IMO, age shouldn't be a factor in writing him off. On top of that, during the hysteria over Mrazek getting unprotected for Vegas/traded/etc. a lot of his apologists on here were pretty certain that by Berniers age, Mrazek would be leading the Red Wings back into the playoffs.
In reality, what young goalie is Bernier blocking from that #1B/#2 spot? Rybar is probably the closest thing they have to an NHL worthy goalie in their system, but he's probably better off getting a bigger workload in GR next season and getting some looks in the NHL on a call up basis, rather than spending anywhere from 50% to (more likely closer to) 70% of the Red Wings games sitting on the bench. I mean, I guess they could try to pry a young goalie that's out of minor league options for next season from another team (Jarry, Comrie, Gillies, etc.) in a trade or via waivers in October? Sure Stolarz is an option, but he's a UFA and could sign with any other team. On top of that, how's he going to feel about signing in Detroit if he's replacing a guy at the #1B/#2 that they just flushed down the toilet after one not so wonderful year with 2 remaining?
And then how do they "flush" Bernier? How many GM's are going to line up to acquire a bad and aging goalie with the 30th highest salary among his position and signed for two more years? Especially when those teams can go into the UFA market this summer and grab somebody like Elliott for around the same money and term, or a passable #2 option for less. Do they buy him out? Bury him in the AHL? Retain salary, attach him to another asset and/or take on some other teams bad salary to get rid of him in a trade?