it comes down to "was it worth it?"
if the dev spends an extra month on an extremely expensive (in terms of development time) group dance scene... well, that dance scene better be pretty amazing, you know? because otherwise... it was a waste.
AI is notoriously bad at handling certain types of scenes, like cramming multiple people into a single scene. a smart dev might actually choose to write a story that plays to the AI's strengths, and focus the story more on 1-on-1 interactions, instead of giant orgies.
quality can't be objectively quantified, it's up to personal taste. development time CAN be measured, and i think it's useful to do so. it is very, very rare for development times to get FASTER as they go, as others have pointed out.
to me, the every-2-months releases felt appropriate for the content that was being released. if the tradeoff for "more group scenes" is "3-4 months development time instead of 2," that's definitely not a good trade in my opinion.