Here's an idea: add all the races we want to Starfleet and Klingon factions by just charging for them like Joined Trill and Starfleet Klingon. Why not? It's free money for Cryptic as I'd love nothing more than to play as a Cardassian and would insta-buy. I'm sure they can do this with other races too, like Romulans.
But then your race will be "Alien" or "Unknown". Not very compelling for the RPer in me.
Doesn't matter. That's just a label on your character screen. Nobody cares about that screen except you when you're playing your character.
Alien is a great race for RPers because you can change your role as you like/as you get bored with the race you're wearing now.
Plus, Klingon hair is horrible. This is why Alien "Klingons" (like Miral Paris seems to be in this game) are way better than Klingons... it's all about the hair. No doubt the Alien "Cardassians" will be way better than any c-store Cardies.
Additionally, for the min/maxers, you can slot the Efficient in there, plus whatever traits you want.
I wish I would have saved the c-points I spent on Joined Trill... but I mostly did the Dil grind to do it, so it was just time spent.