Fwiw, here's Mitch's comparable (By PPG prior to signing) wingers and their cap% on their deals
Panarin: 14.29 (7 yrs, UFA)
Willy: 13.77 (8yr)
Pasta: 13.64 (8yr)
13.38 <------- Marner's existing deal (6)
Huberdeau: 12.73
Kucherov: 11.95 (8)
Tkachuk: 11.52 (8)
Rantanen: 11.35 (6)
Kaprizov: 11.04 (5)
Forsberg: 10.3 (8)
So the first thing I notice is that we clearly fucked up with Willy. He's around 12% if we had just given him the 10M he allegedly wanted in the summer. Because neither he, nor Mitch have done anything to deserve more than Pastrnak.
With that said, Mitch should be in that Pasta/Willy category and not above it.
Also notice that most of the best value deals were all signed in states with no state tax (in bold).