The issue with Seattle is that they have skimped so hard on their offensive line, and I think it's starting to catch up with them.
Wilson's mobility, imo, masks that weakness to an extent. He can buy time, and he is an incredible playmaker on the run. However, last year he was quite banged up -- did the porous offensive line contribute to this? -- and he had easily the worst year of his career.
Also, they dropped all the way down to 3.9 yards per carry last year and only 99.4 yards per game. I think this was partially due to Lynch retiring, and again partially due to them cutting corners on the offensive line.
They are for sure immensely talented though. I think Seattle takes as many gambles as anyone, in terms of raw, high-ceiling talent.