So I actually asked our loft attendant on Harmony from 4/23 about staffing and how things worked for the normal rooms. What he told me was all the lofts on deck 17 get 2 attendants (Loft Attendant and Asst. Loft Attendant), 8 rooms assigned to each pair (regardless if there's a Royal Loft/Ultimate Family suite mixed in). All of the rooms below get assigned between 20-25 for 1 stateroom attendant, and that's even including things like Grand/Owner Suites mixed in including the Aqua suites.
From what I understood was that because of the 2 floors, the lofts just require that extra person to help clean (2 bathrooms to clean, the stairs being vacuumed, handrails, glass panels for the railings on the stairs, etc) that normal staterooms don't have including the 1 level suites on the lower decks.
He said that even though the stateroom attendants below have several more rooms now to cover, overall time wise for each day they are done with work well ahead in advance compared to the loft attendants because they only have the once-a-day service and a lot of them don't envy the loft attendants despite being the pinnacle position to get to on an Oasis/Quantum ship.