The single most significant indicator of future performance is past performance. I’m not saying he won’t have a great season but’s it very unlikely. It’s more likely we see more of the same from him.
JG has shown in the past that he struggles making quick decisions and that’s not something that you can teach. However, it does improve with experience but considering where he started and his current deficiencies which are numerous he has limited potential. Imho, if the Vols have another QB ready it’s time to move on from JG. If they don’t it will certainly be a struggle again this season.