Some of that depends on Larry. My guess is that Isabella will have his offseason focused on being able to play outside. I could be wrong, but I just don't another path for him contributing at WR.
I think the coaches/Keim really understimated his lack of catch radius. He's got short arms, small hands, a body catcher and he's 5'8"
Then throw in a short QB who you kinda worry about throwing over the middle. Basically if Isabella had a Brady like precision passer I think he'd get the ball put on the #s every time and maybe be effective.
However, I'm not sure he's plucking the ball out of the air.
Just gotta hope he develops a skillset next year to be effective. Something. I think Kliff will just coach around his limitations (as of now)