Based on what we've seen of Rosier(which isn't all that much) and making some assumptions on his physical capabilities, I expect to see a lot of bootleg/waggle-type of plays, or at least a lot more than we've seen before. But in today's college football you see teams get a lot of easy throws/completiions with stuff like bubble screens that get the ball into playmakers hands quickly and on the run.
I expect a lot of plays where Rosier may not have to make more than one read. I don't expect to see a consistent intermediate passing game inside the hashes. Rosier has a solid arm but I believe there will be a hit and miss quality to our passing game this season
He doesn't have to be great(not with this defense and the playmakers around him) the question is can be steady and serviceable enough not to blow a game?
Prepare to be shocked, because Rosier is a much better QB than you're giving him credit before. I think the offense will be wide open and everything will be in play (up top, boundaries, slants, rollouts, etc), and I believe the intermediate passing game inside the hashes will be a strength of the offense. Also, Richt is not a "one read" QB kind of guy. He coaches QB's to see the entire field, and to not make any decisions on where to go with the ball during the drop back, but not until you actually "plant your feet."
I believe Rosier will be a better fit for what Richt wants to do than Kaaya was. You'll all see.