Looking at the current CFB landscape, it's not really as surprising as it would have been a couple of years ago. As an "all world" freshman, if he has a struggle or two, it's easy to get benched and then have Georgia buy a hot QB from the portal. Look at what happened with QB1 out of Ohio State. Dude lost one game and they're looking to buy a new QB to replace him...
If Rhule has a reputation for helping kids develop and giving them an honest shot to work through some struggles, I can see a place like Nebraska where the pressure to "WIN NOW" isn't nearly what it is at Georgia, Alabama, OSU, etc.
It's surprising if we get Dylan, but not shocking IMO.