I've had CS1 for years it's still very playable if not a little broken in a few places. The devs appear to be making a good concerted effort to plug the gaps and provide a better product.

Love the sim enhancements.

I don't own Cities Skylines 1, but I'm being tempted on buying 2 with these feature highlights; it appeals to the system-building part of my brain quite nicely.

The systems seem cool, but visually the game looks a bit lackluster, it's kinda uncanny in places. Also what's with that smoke and the flickering shadows?
I guess they just wanna resell the DLC though, it is Paradox we are talking about.
I will probably make a sale purchase if it gets good reception though, I hope the mod support is still good.