Instead of “not really a blocker”, watching him at Alabama I would characterize him as mainly a very competent blocker with just enough receiving skills to keep the defenses honest. Great tools, but at Alabama for some reason the production wasn’t really breathtaking. On some draft sites there is some nitpicking of his blocking technique (to support what you said), but I think he is solid to very good overall at blocking. However, I expected him to do well at training camp, but I guess he hasn’t shined in either blocking or receiving.