Surely there are issues that we're looking into and fixing bugs, but the overall gameplay experience is what we aimed for. Cities: Skylines II is the better game compared to the first one. If you dislike the simulation, this game just might not be for you. If there is a bug that ruins it for you there's a good chance it's fixed sometime in the future. Games are a subjective experience and it is impossible to please everyone. There's a bugfixing patch on its way soon however, so hopefully we'll be able to resolve at least some of the issues that may be a deal breaker for some. We thank you for your patience!
For clarity the above is for the simulation and gameplay. The performance is not where we want it to be and we are hard at work to improve it. This is also the reason the consoles were delayed. The modding support is an important part of a Colossal Order game, so it will also be rolling out as soon as possible.
We are disappointed we couldn't make these aspects of the game ready for you on time, but we refuse to give up. The missing features and platforms will be available in the upcoming months.