After a (rather long) test drive (until right after the first probe), I can say I'm very impressed with this sequel! Back in the Flash games I've played the two prequels for longer than I'd like to admit. I'll definitely be buying this on Steam when it releases there.
I do like how materials from mining play a much bigger role in progression.
It may be my HX2 fixation speaking, but I wished that building ships was more like building rovers. I don't feel as much of a connection when the ships are practically given to me.