You're not paying DC enough for him to hire new dudes and make the game faster
I know you're joking, but adding new people to a late project will make the project even more late. this is one of the first results of serious study on project management back from around 60 years ago. it's always a bad idea if it can be avoided. the correct way is to add people to the NEXT project when you start it.
anyway, summertime saga updates slowly because it's always updated slowly. it was slow before they got popular, and getting more money rarely changes the reasons why it's slow, as mentioned above. it simply takes this much time to do the things they do with the skills they have. and while there are people who can do the same work in 2 weeks, THOSE people needed a decade or several to become that fast too. maybe the SS people will some day, after 5 games, be fast too, but this is the one they're doing with their training wheels on.
they've done literally all the mistakes you can do in a project, like redoing loads of things that shouldn't be redone before the game is completed. but they're also learning those painful lessons.
the good thing is they've never stopped working. the pace might be slow as fuck, but it keeps delivering year after year. 99% of devs fail that simple first requirement of making a game.
