Olynyk needs a hook shot to punish smaller defenders when opposing teams stick a 6-8 / 6-9 guy on him. Especially those skinny combo forward types. Guys who can defend Olynyk very well out on the perimeter and due to their superior quickness deny Olynyk's dribble drive capabilities.
Olynyk needs a go-to move in the low post to be able to attack those types of defenders effectively. To get them off of him. For now, the only times I really want to see Olynyk in the post is when they stick a little one on him.
Against guys of similar height who usually have superior strength, Olynyk's advantage is out on the perimeter where he can create mismatches with his shooting, passing and ball-handling. I don't see him having much value in the post against those players.