I'm not really sure of your point. Are you saying the space legs portion of the game won't be perfect so it shouldn't be tried, are you saying some players will prefer the space legs portion of the game and will be annoying, so it shouldn't be tried? Well, I suppose we should scrap exploration, and trading, and ship combat, and you know, while we're at it why don't we just shut down the servers altogether.
Really, though, I can't imagine why walking around and having FPS game play couldn't be at least as well done as the flying around and space combat game play. It isn't as though the devs are incompetent, or in deed, lazy as some would put forward.
Further, fundamentally, this isn't a game about flying space ships, this is a game about being a space cowboy in the space old west, and being in space. That could mean never setting foot planet side and not even knowing what natural gravity feels like. Or it could mean literally never leaving your home planet ever. And until this game can convey the feeling of being a person going about their business in space, and not of an AI piloting an automated hauler or security vessel, this game's themeing will be a failure. I'm very sorry if that concept upsets you, but the truth cares not one bit for your feelings.
At its core, this is a game that attempts to put you into the skin of a person living their life on the new frontier, while separating you completely from any sense of reality by gluing you to your chair. It's game attempting to convey the vastness of space, while removing any familiar point of reference to allow you to judge scale.
As I say, I like this game, but this is why I want this game to improve, and succeed in its goals, and that does fundamentally mean things like space legs, like atmospheric landings, and yes, like ground combat, are necessary additions. Will there be growing pains? Sure, but there are growing pains right now. Why should that be a barrier?