As a man with no defensive home and a good but not great bat, Morel is just an incredibly frustrating guy to plan around.
If he walked more / struck out less, he'd be easy to pencil in as a great DH. But most teams without great DH options simply use the DH to rest regulars and rehab minor injuries. So using him there full time feels subpar. If his physical tools translated to some defensive skills, he'd be easier to plan around. But for whatever reason, they just don't.
For a lot of people, I think myself included, it's easier to just assume other teams see his prodigious physical tools and somebody out there thinks they can fix him, and would value him accordingly. So we're content to rest on the easy idea that he should be on the trade block. It's harder to imagine the Cubs player development fixing those issues for him at the major league level, but I'd be thrilled if that's the case.