Honestly, it's because Hoes is not a good CF.
From the games I have watched, he simply does not track the ball well. He takes below-average routes and would be much better suited as a corner guy. Avery is the more true CF and really is the better option. He takes above-average routes and generally gets a better jump on the ball. Both of their arms are average at best imo.
I do agree that if they want him to play LF with the Orioles, that he should be in LF at Norfolk.
On the long term option, I couldn't tell ya who they think is better. I know coming into the season I was higher on Hoes, but Avery has done everything I wrote and said he needed to do.
Also, you are probably looking into this way too much lol. But hey, that's what we are supposed to do right?