First off, this is just my opinion. I know yours is probably different, and I respect that, but this one is mine.
Maybe I played too much JTL in the old Star Wars Galaxies MMO....maybe I played too much X-Wing vs. Tie Fighter as well (yes - I'm dating myself), but those games felt like Star Wars. It wasn't just the look or sounds - by comparison the graphics on those games were primitive - it was everything about the experience. I felt like I was flying a fighter in a Star Wars universe. This feels like...I'm not sure what, but it doesn't feel like Star Wars to me. Make me defend a capital ship, assault a space station, fly past a blockade to get to a planet. But GSF could just as easily been branded under "Battlestar Galactica" with some graphical tweaks - and probably feels more like that anyway (at least to me). Not exactly like that, but more like that.
And it isn't the control scheme - it took me a few times to get used to it, but I've made it work. It's just the experience is not Star Wars.
To those that like GSF - I'm happy for you. I'll continue to try it, but it feels like to me like experiencing a celebrity by going to a wax museum instead of the "real thing".