I don't believe the bit about any Landry/Gase rift. He may be tradeable, they may think his contract demands are too much to bear, and they may prefer a TE that can flex out and be a seam threat as opposed to an ever-present slot guy ... but I'm still not buying the rift. Both of those guys are wide open honest people. Gase gives Landry huge respect and free license to express himself. Landry use it and does not abuse that freedom. Both guys seem to have tremendous respect for one another.
But as DolphinJohnNY said earlier ... anyone is tradeable. Even if Landry walks next year, we'll likely get a 3rd round compensatory and 14M+ of cap space to find his replacement. That's high compensation for any slot receiver. So, any trade amount would need to be higher than that. I just can't see many teams willing to pay his number and give up a 2nd rounder or more. Cleveland seems like one of the few options there.