I can only comment from a NSW perspective, but I think ACT would be similar.
It would require the consent of all owners to such a proposal. You can bet that any lot thst potentially faces higher levies is going to vote against the proposal.
Anecdotally there are many strata that have UEs somewhat out of whack.
This particularly applies to older strata, where more value was placed on lots closer to the ground ( less steps) to walk, whereas today lots on higher levels are more valued especially if they have a view.
Its quite expensive to redo UEs so there would need to be a very good reason to do so.