That's literally a lot of change.
What's been invested in those two implies the team sees them as starters over Cole, Moncrief immediately and Chark by '19 or '20. Also, you didn't mention Lee's big extension.
And calling Chark a 'gadget player' is silly. Chark is a 6'3" outside-WR. Jags didn't spend a 2nd round pick on Chark planning for him to only ever be on the field in 4/5-wide. Tavon Austin is a gadget player.