add to that the fact its all disjointed instances aka rooms in space and all my excitement for planetary landings is gone..poof...
Time will tell Jools. I don't like the "idea" of rooms in space very either much but they're not rooms at all of course, they're player-instance switching, but that does get offset a bit, when MMO is added and you can comm with others. That's something FE2 never had! And I still lurv that game too.
While a lot of what you mention may ring true, to me the build of the whole game has been a fairly massive undertaking, many, many elements. The PG and assets, although sticking out in game play in places maybe, I don't think can really be described as "rough"? But in terms of the game architecture as a whole, these seem to be quite small detail, details which can be changed, and we also have to bear in mind disparity, between peoples machines (and interacting and add t'internet).
I'm not pure enough to care all that much, about how the play is stiched together (as long as transfer between instances is optimised enough to feel seemless in game, that will be a work in progress I'm sure). I expect there to be a different mode of travel, something between normal space and SC, re-entry flight, to get you down to the surface .. but suggest there will be fewer player-instance changes to compute, being shorter range than SC, and therefore being much smoother.