The number of recruits in Frost's classes have been 22, 27 and 22 (not finished yet). At least the last two have started off, in this stage of the cycle, estimating that the number of recruits was lower than what we started with. So, the initial number might be 19, but I'm betting that it will end up somewhere around 22-25 by the time it's done.
I would say that next year, we need 5 O line and I'll guarantee you we have more than one WR and DL in the class.
As for the cover LBs, I really wouldn't necessarily look at what we are losing as seniors. We need to be looking at what's in the Freshman and Sophomore classes. Those are classes the 2021 class will be playing with mostly. I believe we have some good cover LBs in those classes.