There is/was no cube hierarchy. You have the Borg queen and then everything else. Ship sizing wasn’t an indication of anything there than use case iirc.
Plus, a collective, as well as one ran by a leader, has no use case for a tiered authority structure. Unless compromised, Borg already always know the current plan. Thats why any ship could destroy every other ship.
I dunno, that seems like a ginormous gaping security hole, if any ship containing mere drones could be compromised - even the tiniest ones with the least powerful engines (& thus shields, etc.) - and then it in turn could decide to blow up the queen… and/or literally all other ships. Any collective with such a feature baked-in sounds like it would not remain in existence for all that long, unless there were literally no other species nearby it that were even remotely close to their level of technological development.
