I think he'll be okay with going through reads. My issue is, will he be willing to attempt anticipatory throws into tight windows down the middle? That's where bread is buttered in the NFL. 3rd and 9, 4th quarter, down 4, will he hit McLaurin in stride for a big 15 yarder to keep a game winning drive alive? Say what you will about Howell but he could make that throw at the very least.
I have no doubts about his ability to hit the sidelines or deep shots downfield. But those tough throws down the middle is my concern with him.