I'm actually pretty high on Dalbec, which is weird because I was low on him when everyone else seemingly was high on him. I think he needs time to adjust, and I think he has the talent level to justify it, if Santana can hit in replacement of Francy it's going to take a little bit of pressure off of him too.
He's never going to be a .300 hitter, if his hit tool ever took that big a leap he'd be the MVP with his power potential. He's barreling up the ball when he makes contact at double league rate, normally people who hit the ball that hard have higher BABIP than .280 and his lifetime average is .315. So, to some extent, he's had bad luck.
I think he's going to be a streaky hitter, in the same form that Jackie Bradley was, he's going to have months when just goes on a tear and hits 10+ home runs. Unfortunately, he's likely the odd man out in a year or two when Casas is ready.