Quick first thoughts:
The Good
People have been crapping on the UI - but I'm a big fan personally. Makes modding/playing so much more efficient.
Dig the attribute system, love when workers have more of a distinct personalities and development.
Lots of the smaller additions are appreciated. New locations, potential narratives, etc.
The Bad:
The new product system. I do like that that the AI is more likely to evolve, but I don't like being forced to choose presets (even if there are over 60). Do the presets probably cover most of my usual product choices? Yeah, probably. But...I dunno, still want to be able to choose the individual elements myself.
Drop down menus where you an only see a few of the options are a pet peeve of mine. Obvious effort has be made to make to make aspects of the game not so time consuming, but this continues to be an issue. Maybe I'm misremembering, but I'm pretty sure WMMA 5 allowed you to see a ton of attributes at once, and "add" them to a worker. Was hoping for something similar here.
Overall, I'm digging it. I'll probably hold off buying until the inevitable bugs are addressed and historical mods come out - but I'm more excited than I was before.