There aren't enough roles. There's admin, moderator, and user, but it would be best to have tiers of user in between. Reports go to 4 categories of user when you file a report. Report a comment for violating a fun rule your community decided to implement (all post titles must contain "Jon Bois Rules!")? That report goes to: the community moderators (good), the community's host instance's admin (bad), your instance's admin (bad), the user who posted the "offending post"'s instance's admin (bad).

Only admins can permanently remove illegal content. If a mod "removes" it, it still sits visible to all in modlog, and for the purposes of CSAM specifically, that counts as distribution which is prosecuted as a worse crime than possession. Federation with other instances is effectively binary. You can or cannot federate, you cannot set traffic as unidirectional like you can on most other fediverse platforms. The modlogs make it hard to parse who the moderator performing an action is acting on the behalf of. Was it a community mod? An admin? Your admin?

There's more but my phone is getting low on battery