Why can't we judge his delivery? We already know that it a) increases the likelihood of a shoulder injury (something he had this season and something Taijuan Walker, who made similar changes to his delivery, also had this spring), and negatively impacts his release distance, which makes his stuff play down across the board. He could succeed in spite of those things, but it's still a negative change and not helping him.
The only hope for me is that the Jays were just working on him getting a specific part of his delivery down and will go back to an extended stride this season. If this is what they want to go with long-term, I'm still not even close to writing him off, but I'm worried.