After taking another look at next year's OL depth chart, Jackson would be our most critical get at this point in terms of filling a need, IMO. (I'm assuming Antonio Richardson will not qualify, and I think he projects as a tackle anyway.)
LG
JerQuari Schofield (6-6, 331, SO)
Kyler Kerbyson (6-5, 290, FR)
Caleb Leonard (6-3, 265 SO) (walk-on)
C
James Stone (6-4, 295, SO)
Darin Gooch (6-3, 305, JR)
Mack Crowder (6-4, 275, FR)
? Cody Pope (6-6, 290, SR)
RG
Zach Fulton (6-5, 315, SO)
Carson Anderson (6-2, 280, JR)
Kevin Revis (6-2, 285, SO)
Travis James (6-3, 335, SO) (walk-on)
That may look OK on paper but of that bunch, only 4 or 5 are SEC-caliber linemen, IMO, with only 3 viable guards. And pretty much every year, you can count on one or two OL starters getting injured and missing some games. That's why I think it's very important that we add Jackson or another quality guard. While Posey could potentially slide inside, we don't exactly have a surplus of OTs, either.
I really hoped we'd add 5 solid OLmen to the roster next year, but that apparently won't be the case.