For WR:
* we gained & lost Hazelton via the portal, so I guess that's a push
* we lost: Robinson, Kumah, Grimsley, Patterson, Pimpelton, Savoy, some others I can remember
* we gained: Hodge, Fairs, any others?
summary: loss

For OL:
* lost: Nester, Hudson, some reserves
* gained: Hoffman, Jordan
summary: push?

For DL:
* gained: Reed, Williams, Griffin
* lost: more than I can remember; we lost 5 in 2020 alone
summary: feels like a loss, but I'll defer to someone more knowledgable

For RB:
* gained: Khalil, Blackshear, some reserves
* lost: McMillan, some reserves
summary: Khalil makes this a clear win, 2020 would have been a complete disaster without him

For QB:
* gained & lost: Brockmeister -- push
* lost: Jackson, Patterson, Hooker, some reserves
* gained: Willis, Blumrick
summary: loss

For DBs, LBs, TEs -- Off the top of my head, I can't remember enough to say.