I see no reason for the bolded to be true.
The 3rd winger on Jack-Bratt and Nico-Timo's lines has had little to no impact. This role of complimentary top 6 winger is one of the more overrated ones in terms of importance by a large amount.
Both of those lines did excellent last year. I see no reason to spend significant assets trying to make marginal improvements to a pair of lines that already dominate
Palat with Jack and Bratt was noticeably(by the numbers not the eye test) less effective then those 2 without him. Palat with Jack and no Bratt was downright bad. So not only was Palat on the top line less effective, but you lose line flexibility as well.
Similarly playing Timo on the 3rd line leaves Nico's line bare. Lacking in line flexibility.
The problem is that if Jack gets hurt (likely) or Timo decides to take 70% of the year off (also likely), now you have Bratt + Nico having to carry 4 guys and we saw how well that worked against Carolina.
I really don't see how anyone can watch what happened down the stretch and not think that we need a significant upgrade to our average forward quality.
EDIT: Look at the four teams left and tell me how many of them would have guys like Noesen, Mercer, or Palat on one of their top two lines.
Ya, you can maybe pencil meh guys into the top 6 at the start of the season, with the thinking your stars will carry those lines. But when the inevitable injuries begin to happen, you then have multiple meh players playing together in your top 6, and fringe NHL players on your 3rd line.
I would kind of like the idea of Glass as the 3rd C, but with Jack's injury history, I really can't make an argument for it. I think Grits could be a top 6 guy right out of the gate, but if he's not, and if one of Timo or Bratt miss games then you have one legit top 6 winger in the lineup(something we luckily didn't deal with this year, but did last year). If you have a combo of any of our top 4 fwd's missing games the lineup really looks depleted.
I think we need a legit 3C, and that makes Glass a very good 4C. But another proven top 6 winger is how I would approach the wing depth issue. Add a high end guy allowing the likes of Grits, Mercer, Ham's(starting in Utica) to be the quality depth. And because of Bratt and Meier's ability to play RW, LW is probably where I would look to add.
So top 6 LW, and 3rd line C. Everything else can shake out around those moves.