As a UK student, I see him walking around campus almost every day. I thought it was very odd for him to still be here, but thought maybe it had to do with some rules and regulations of a transfer. Now that he's here for the spring semester, it does make me think there's a chance he stays. Like you posted, why wouldn't he want to get a head start on practices/weight room while he redshirts? With Mainord and Dawson gone, who knows? Maybe he's coming back to the team?
He was a 4 star WR coming out of high school with a ton of upside. I talked to Mike Edwards about 2 years ago or so when they were playing in their senior seasons, and their teams scrimmaged one day. He said Thad was the only guy that could make a play on him on the field. Beat him for 2 TDs that scrimmage, and it got me pretty excited for Thad to be here. Maybe he just didn't develop at all when he got here and didn't take the strength and conditioning program seriously. He's still way too skinny, but he could be a great player in 2 years.