Speaking Moistly
What a terrible image.
I think that a good rule of thumb should be that a team's 4th line + 13th forward (4 players total) should NOT cost more than $2.5 million total. That's an average of 625k per player. Adams is a little above that, Vitale & D'Agostini are a little under it. Glass brings ours to a total of $2,925,000 for our bottom 4 forwards. That not-quite-a-half-a-million may not seem like much but it truly is, not to mention considering Glass doesn't even earn that kind of a paycheck. You could literally replace him with Zolnierczyk or Sill or even Conner and lose nothing in the grand scheme of things.
I think the reason they're so stuck on Glass is because he has the appearance of a prototypical 4th liner and the other guys that are cheaper and outperformed him in camp do not. But at some point you have to ice a 4th line that's going to help you win hockey games, not the one that fits the majority's ideal of what a 4th line should be.
I think part of it is also admitting how much they messed up with Glass. They not including Bylsma. Which I think is a portion of their problem with Fleury, too. I think Bylsma's/Shero's idea of a 4th line is seriously flawed, outdated.
Replacing Glass with Sill or Zolnierczyk would most likely be an improvement and cheaper, at the very least it would free up some money which is helpful.