I went and watched Saturdays game against Belleville and this is what I can say about Zadina.
Offensively he has trouble finding space right now, he wants to be flashy and make the exciting plays on offense but he doesn't have the space he wants. He had trouble handling the puck on the rush, making passes, receiving passes...ect. He got rocked in the 2nd period trying to split 2 defenders at the blue line with his head down. I think a year in the AHL is exactly what he needs, once he finds his space and gets a little stronger, he should start to look like he did in Junior.
His defensive game is actually very good. He back checks extremely well, you can tell he always wants the puck on his stick. However he is weak on his stick and doesn't do great in tight battles along the boards or anywhere else for that matter. But his positioning is very good, he's not often in the wrong spot.
Zadina will be just fine, he has the hockey IQ of an elite player, just needs to work on a few things, especially getting stronger.