Not wise to judge a book by preface and for SotS too soon to judge quality.
So much is missing, no map, no scene player, no album etc., and so much more to complete before release version of game. Only small number of character seen and next to no plot or story shown yet. What we have is like a taster demo for game to come and best to wait until new game engine debugged and done and ball rolling with interface, game play, updates and so forth.
I do think many player with older equipment made be frustrated by having to disable enhanced effects to play SotS at satisfactory speed; for me game still looks really good and so not a worry personally.