like you said, development is best for small, western countries wanting to stay small. If you want that specific playstyle, you need to buy the dlc. Just like if you want to play with tribal governments, you need a new world expansion. Or if you want more interesting republics you need Res Publica.
My guess is that you simply have not yet been interested by those other styles, but that development actually caught your eye and now you notice the business model, which has been the same all along. You're in no way punished for not having CS. The AI won't develop their provinces either without the dlc. You got a ton of new features in the patch, so you either enjoy those, pay for the dlc, or revert to an earlier version. But "everything should be free" isn't going to catch on anytime soon.