I vaguely recall a discussion where that was proposed. I don't recall committing to anything, my response to the proposal or if I responded at all.  Can you refresh my memory?
I know the vast majority of these non-hamlets do not qualify for Category:Designated places in Alberta, as defined by Statistics Canada, and likely all won't qualify for Category:Former municipalities of Alberta (I think that category is complete from a former urban municipality persepctive except for a few that don't have articles yet whatsoever).  I'm opposed to hastily replacing these with Category:Settlements in Alberta as there are multiple definitions for unincorporated non-hamlet settlements in Alberta.  Let's discuss unincorporated non-hamlet settlements further once I'm done with purging the non-hamlets from Category:Hamlets in Alberta. I'll also put refinement of Category:Designated places in Alberta on my to-do list.