Here is a link to a full game of Tanner Lee starting at QB:
http://noonkick.com/2015-tulane-at-14-georgia-tech/
Here are my observations against a far superior team (Lost 65-10):
He was under pressure before even getting into his drop and before the WRs were into their routes pretty consistently. (I was a little skeptical of that being a reason for low completion percentage, but now I do understand what he was facing often and agree that he will have better protection even with an O-line like we had this last year)
He had to do some throwaways in some of those cases and did.
The coaches had him running some zone read, but he didn't keep it.
Had a couple incompletions when getting hit.
He ends up doing roll outs frequently to avoid pressure.
He can complete nice screen passes to the running back out of the backfield. Good stuff.
Doesn't throw that well on the run when in the roll out. Had a couple that were either low or high on the pass (more low than high).
Steps up in the pocket when it is appropriate mostly.
He has a really nice arm. Can make all the throws when he has time and someone open even just a little bit.
He has a good ability to hit the short and easy throws.
He seems to move through progressions when he has the time and the first option isn't open.
He threw an INT on a play where he and the receiver were not on the same page. He threw a comeback route and the receiver ran a fly.
He didn't really try to force a great percentage of throws. Only a few times. Mostly into tight coverage with a couple into triple coverage (one for a TD).
He had a couple throws that were dropped, but for the most part were either thrown away or complete.
Overall a little more encouraged on the low competition percentage than I thought I would be, but this is only one game against a team that was sooo much better than them across the board, so it is somewhat difficult to make a lot generalizations.