I think you are WAY off on this one. I would bet money that the Oregon offense will be better under this kid then it was under Vernon Adams (who i also love and am very thankful he came to Oregon for the year). Pass effieciency might go down a bit but the offense as a whole will be signifigantly better with the running threat from the QB position. Adams is a great QB and a leader but he was a bit of a square peg in a round hole in the oregon offense... but they were able to make it fit. This kid is straight off the assembly line for what the Ducks want. I read one quote from a non Oregon coach that said that Prukop, along with Josh Rosen, will be the best QB's in the pac 12 next season. Plus the Ducks offense as a whole next year will be more talented then this years team.
He's also directly from the Chip Kelly tree, so he pretty much knows the offense already. His offensive coordinator (who's also been hired by the Ducks to be the QB Coach) played QB for Chip Kelly at New Hampshire and then was on the coaching staff with Chip Kelly there. So he could probably step in and run the offense tomorrow.
For comparisons sake, this year against Eastern WAshington Adams passed for 246 yards and rushed for 94 (He had to play into the 4th quarter before getting hurt, because that game was basically a shoot out). Prukop against E. Washington this year threw for 353, and rushed for 198. Btw, the games that he lost this year the opposing team scored 34,44, 55, 49, 54 and 59 points so it didnt seem to be an offensive issue.
I'm not saying the kids going to be Mariota, or an NFL player (he never even played QB in high school... he was a safety), but he's a perfect fit for the DUcks and i'll be shocked if he doesnt tear it up.
As for the Ducks getting cute with transfers this should be the last year they have to do it. Admittedly they've had some whiffs and just some bad luck in QB recruiting the last few years. First Brian Bennett, who was pretty good, lost the job to Mariota and didnt want to sit behind him so he left. Jake Rodriguez who looked like he was going to be a stud had a Joe Theisanesque leg break and never came back from it, Damion Hobbs just wasnt good (whiff) and he transferred, Morgan Mahalak has all the tools but apparently not the work eithic (whiff). Now though we have 4 young, good, solid looking QB's in the pipeline coming up, Prukop will bridge the gap to them.