Personally, I like it. Seeing these massive battles play out is amazing to watch and participate in. Sure, it's not perfect, it'd be nice for my framerate to not drop as low as it does sometimes, but my PC isn't exactly amazing, so it's kinda expected, driving can be annoying sometimes, but the only thing I use vehicles for is transport, so that's forgivable for me. Getting around is fairly simple for me though, I don't see what some people are complaining about, there's a hotspot deploy system you can use, and if that's not up, just get an aircraft, it never takes more than 5 minutes to fly somewhere.
I like the idea the progression system goes with, but some things are just asking too much in my opinion, the 1000 cert guns being one of them, although personally I like the 250 cert gun better on my combat medic, than the 1000 cert one's.
Overall, it's pretty good in my opinion, and if the issues it does have were fixed, it would be amazing.
Also: Terran Republic = awesome. Loyalty Until Death!