This has come such a long ways! I think I'm realizing I just really don't like the upgrade research system though. The presentation makes it very annoying to sort through to see if I have the required resources for something, let alone compare my choices. I guess just highlighting or sorting by what you can afford would solve most of the problem.
Purely needing to grind by searching for spawns is also pretty boring tbh, I think there could be something more interesting