Mond is not a world-beater, but he is serviceable. He progressed from a 8/6 TD/INT ratio and 108.8 QBR in 2017 to 24/9 135 in 2018. I think part of that is maturation, part is the addition of Sternberger, and part may be attributable to other factors such as starting against more cupcakes and possibly (gasp) coaching. Losing Williams and Sternberger won't help him, but he does still have Ausbon as a target. OL coaching and hence protection, unfortunately, are likely to improve for him this year.
By the time these 2020 guys are ready to sign their December LOIs, the season will have unfolded. I don't think aggy will have the offensive weapons to keep it as close against Bama this year, even playing at home. At Clemson will be a 4-alarm hazmat dumpster factory fire. Aggy is exactly the kind of unimaginative offense UGA was built to stuff when they ran into us-- I think their talent level will make that game ugly for aggy. The taste that will be in all those guys' mouths (recruits-- actual aggy has, shall we say, its own preference in this regard) will be the bayou beating over Thanksgiving weekend.
The guys without options and the hard-core whoopsidaisies will stick, but some of the fence sitters, profiteers, and chosen-by-Saban will trickle out or have "tearful decisions" to choose someone else.