He has the potential to be a very good passer but like Steve Young he will always be remembered as a QB who could make big plays because he had wheels for feet. Anae could think up every pass play imaginable but that's not gonna stop Taysom from using his athleticism to improvise and take risks with his body.
The improvement of the defense will depend a lot on just how much Bronco is involved with those guys. If he's running their practices and getting down in the trenches with them then I expect to see a noticeable improvement. But if he's leaving Nick Howell in charge of practices and just calling the plays on gameday then I'm not expecting a huge improvement from last year.