I don't have deep knowledge on the recruiting details, but here's what I can glean while trying to put on rose colored glasses.
Jake Moretti and Grant Polley are among the highest ranked offensive line recruits we've had in quite a while and both are redshirting this year coming off of injuries, hopefully they make the line better. We have depth of talent at WR so losing Ross, Fields, Bobo won't sting as bad as it might look.
According to 24/7 sports there are 6 players on the roster who were 4-star recruits, 4 of them are freshman (Moretti, Polley, Isaiah Lewis, & K.D. Nixon), 2 are sophomores (Beau Bisharat, and Tim Lynott). So the best rated talent (
at least by 24/7) is staying on the roster.
Isaiah Oliver is the best player on the roster, he might go to the draft, he might not, I'm not sure if there's a good guess on that one. The loss of Jeromy Irwin and Philip Lindsay are the two most concerning issues that I can think of.