You...you think monthly updates are "taking a long time?"
You must be new. Go talk to the Mifly City crowd about how badly this dev is "milking his Patrons" by only release small monthly updates. I mean yes, the last update was pretty small. Basically just one sex scene. But most games release updates every 2-4 months. Some of the best, like Summertime Saga, takes longer than that.
Honestly, I think this is a good way of doing things. It shows his Patrons that he is actively working on the project they're supporting, and they get content frequently. If you'd rather larger updates that are more spaced out, that's a pretty easy problem to solve. Just skip an update or two. Download an update every three months and you'll have a regular 3-month-sized quarterly update.
...what?