The Long-Term Value of ETN

I have some pretty big concerns about ETN's long term value as a dynasty running bag. The guy is athletically very gifted as seen by in that stretch in the middle of the season, ripping off 40 yard runs seemingly every single week. Those also could fall off a little bit and tank could come in here and steal goal line work. Or maybe the passing game just really evolves with the addition of Calvin Ridley and Trevor Lawrence taking the next step.