I ended up buying it. I'm near the end of the campaign and it has been enjoyable so far. I'm not sure what my motivation will be after the campaign has ended. Each sector (which there are 9 now, 3 for temperate, arctic and moon) also has there only story quest line, but it is done in the standard Anno quest style.
There also seems like there is some balance issues in the high end game. Some last tier buildings don't seem to be financially viable - and that appears to be there only purpose. You are better off just not building them.
I'm not sure what to think of the streamlined parts. It's kind of nice not having to organise transports between islands. I've never been big on combat in Anno games, so having it as a separate optional instance is nice, as well as not having to allocate primary resources into building combat ships.
The 2 upcoming expansions will each add a new climate zone, with their own resource chains, so there could be some interesting possibilities there.