We don't even know who their starting QB is yet.
As always - they lose a LOT to the NFL. Likely (4) 1st rounders.
Not having the potential #1 overall pick in CJ Stroud under center will certainly be an adjustment.
They have a couple of Johnny Utah's competing at QB. Kyle McCord, Devin Brown. My assumption is McCord gets the nod as he is a Jr, but freshman Devin Brown looks to have a lot of upside.
The WR group is insanely talented with both Egbuka and Harrison returning - both guys would have been 1st rounders if they were eligible. WR Julian Flemming opted to return for his Senior season - likely because his entire collegiate career he's been playing with absolute stud WRs and he hasn't accumulated the stats to warrant a lot of NFL attention. But he's definitely an NFL talent - likely as a slot WR. He's also a great blocker.
I also think this will be a huge year for RB TreVeyon Henderson. He was injured last year and missed the last 4 or 5 games of the year. BEAST. His freshman year he had 1560 all-purpose yards with 19 TDs. Now he's a junior. Just another dude you'll eventually be watching on Sundays.
Defense should get better.
Buckeyes will be very good.
But a lot will depend on the QB play when they match up against Notre Dame, Penn State and TTUN - and then whoever big dawg they get matched up against in the post season - be that Bama, LSU, Clemson, Texas, etc.