You've been hardly playing a month and already complaining about the need of more content? I've played for well over two years and still haven't got bored with it. Here's a good question how many other games actually release more developments _without_ being subscription based? VERY FEW. So just sit back, race in a UF1, or XRG or BF1 or something that works for you and wait.
Edit: SilverArrows beat me to my point.