A big thing you gotta consider when chasing big name UFAs is that they destroy an internal cap.
It seems pretty evident that the hold up with Seider, and the reason he didn't get an 8th year, was because they weren't going to let him make more than Larkin's $8.7M.
It's hard to tell the next group of guys "You don't get to make more than X" when you throw $12.5M at a Rantanen or a Marner. Not to mention it probably pisses off a guy like Seider who was likely told you can't make more than Larkin did, but then you turn around and give some outsider $4M/year more.
... All this aside from the fact that I think giving a UFA winger $12.5M/year is stupid in the first place lol.