As you know his blocking was superb but we can't afford to pay a slot reciever that doesnt stretch the field that blocks well the amount of money the Browns gave him.
When you're are the point of trying to argue how well a receiver blocks I think we can say you are now reaching just to build a narrative.
Why wasn't there a bidding war for his services?
My guess is he has a tantrum by midseason because Cleveland will stink, they will be very run heavy and Todd Haley will quickly discover that Landry in the slot is the most efficient approach.
People are also sleeping on Mike Gesicki as a slot option for Miami. The guy can beat defenders, make one handed grabs, and go up for high passes that your typical shorter slot guy wouldn't get. If he, Amendola and Wilson are as advertised then Landry will be quickly forgotten.