Bigger D1 programs tend to reload, as they have plenty of guys developing behind the starters. I would guess the top tier teams to do just that. D2 a different story, as a lot more difficult with limited number of players.
Of the D1 teams at state this year, I would go with the following:
1. St. X - bring back strong core of starters with a dominant OH (Pung), and great libero (Huber) to control the defense and passing.
2. Darby - Have one of the top setters (Platfoot) in the state, and they develop their players pretty well. They have some returning height which always helps.
3. Elder - graduated some heavy hitters in Klusman, Koenig, Witte and their libero, but still a good core returning.
4. St. Iggy - lost some key players (setter, OH, MB), but their defense will keep them in matches
5. Moeller - def hurt by graduation but i'm sure they have kid waiting their turn
6. Lakota East - started 4 sophomores most of the season should boost their confidence going into next season. Will miss Evan Kuhlman--but they finished half their season without him regardless.
7. Northmont - key players returning including a strong setter (Foy), middle (Blankenship) and OH/MB (Walker). Think they will be one of the top teams in the West.
Beavercreek and Centerville both lose a lot to graduation. Creek has a few starters returning, including Mikesch and Abbitt, which should help. Centerville has a big OH returning (Skerl) and a lot of role players.
East region will be another rising D1 program --could Olentangy make the trip next year? or revert back to Davidson?
North 2nd spot up for grabs with St. Eds, Brunswick, Jackson. Jackson had a fairly young team after graduated a lot of players from their 2016 regional championship team.
D2 is always harder. Of the Final Four teams, all team besides Alter graduated all their big players. Hoban loses most of their starting line-up, although returning setter Leyden. Scioto loses most of their varsity team, including Derek Topp. McNicholas loses all their offense, but might have enough to return. Alter returns 5 junior starters, so they will most likely be the front runner again. I'd expect some surprise teams to pop up (like Scioto, Fenwick over the past few years) Walsh will battle Hoban to take back the north, East between St. Charles and DeSales, South Badin could make some noise, returning a lot of their young team. Might be enough to dethrone McNich. In the West, Fenwick graduated their big lefty, but return their setter, middle, and other role players. Carroll loses their big hitters, but return a setter, libero, OH and CJ loses their big gun, but will bring back a lot. I'd rank like this:
1. Alter - until someone else beats them in the postseason
2. St. Charles - return good core of players
3. Walsh - best team in the north?
4. Carroll - enough returning to crack the top 4