Am not staff anymore but it doesn't stop me thinking about issues.
I have noticed that chunks being loaded on E2 whilst players are offline seems to be an issue and was following a forum trail whereby someone was asking to be able to unload chunks on player logoff..:
https://www.reddit.com/r/feedthebeast/comments/br6oqe/can_i_tell_ftb_utilities_to_unload_chunks_if_a/:
The suggestion from that was to use a mod: https://www.curseforge.com/minecraft/mc-mods/player-activity
Where a command is run on player loggoff, but there might also be other command options as well to play with:
/chunks unload all (playername)
Seems a little radical, but as they say: 'if needs must"
There are also other mods we're aware off and were toying with the idea of running but i dont have access to the discord chat anymore so cant comment further.
