I mean, sure, you could very well be on to something in the sense that they want to see him improve upon his weaknesses; and while those 2 plays stand out as the examples that many use when describing his problems, I tend to think that there was a lot more to it than "just" those two plays alone.
I'm not one to totally give up on Tavon Wilson or to not say that he did some things right and had some flashes of talent etc, but I think that as a whole he is still very much an unknown at the position. In other words, not someone who we'd really want to have to depend on.
Either way I'd still feel better if Gregory stayed one more year myself, at least until Wilson and Harmon get some more valuable reps and experience underneath of them. That's just my humble opinion though, as the subject matter is controversial and there will be those who agree and disagree. I'm by no means trying to say that I'm right or anything.