The game is desirable for people without a ton of money. It seems it's not desirable to you. There's a difference.
And please, don't start with the 'I pay for this, I should get everything my way' spiel. If Cryptic limits the charslots to 2-3, then that's what you pay for. You're not getting less then you pay for unfairly, you're getting less then you'd like. There's that difference again. Working as intended.
That said, yes, more slots would be nice eventually. But if not, I'll enjoy my game with three characters till I tire of it and move on.