You aren't going to find many players that generate value in every aspect of the game.
I'm not attached to Santander but his OBP isn't a make or break issue for me.
I think people are going too far on the “plus defense” aspect of things personally.
But sure, if he can play plus defense and slug 480-520, he is definitely valuable. Him being valuable isn’t really the question. It’s how valuable is he.
Anthony Santander annual posting up report card grades, Age 21-25
2016: A
2017-2018: our Rule V pick is "injured"
2019-2020: I dunno....C ?
This year's Forecaster book only has 136 days for 2017's, ahem, strained elbow, and the oblique last September on his 5-year injury log. I can get my man being pretty pumped he was blasting Max Scherzer last summer.