The issue is the org has insisted on building its third line and by extension its bottom 6 around Lowry. I like Lowry but he's incredibly limited in his scoring ans thus derives the identity of his line and the Jets bottom 6. He's had solid to good offensive years but on average he's scored at 4C rates
This.
As goes Lowry, so go the 3rd and 4th lines. It's been a pattern with the Jets for a while now: pick a few players to build around, then fit or force players into complementary roles round them. So Lowry is soldered into that 3C spot and the search is on to find players who work well with him, as opposed to just building a strong 3rd line with or without Lowry.
Barron, Apples, Names and Nino all worked out at various points last season, and we had a useful if not always productive 3rd line, but it seems like the team might do as well or better with a more flexible approach.
Same with Wheeler as 1RW then 2RW, 55 with 81 as a two-man unit, etc.
I don't know whether the Jets feel bound to keep Lowry as Forever 3C because they have a specific idea of how they want to deploy 4 lines, or because they view him as the best option there as key part of a shutdown line, or some combo thereof.
But it leaves them with 1/2/Shutdown/Spare parts in a league where rolling 4 lines that can score has become increasingly the norm.
It isn't just about the horses, IMO, but about a roster / line philosophy also.