STO managed to live long and prosper because it was all Star Trek fans had. It's not like there's much in the way of choice. It was horribly rushed, and greatly disappointing at release due to the incredibly thin content.
Definitely not what fans deserved, but thanks to CBS and Cryptic, it's all they got.
Since then, the game hasn't really deepend, just expanded. More thin grind for content. The foundry shut down due to lack of resources. But luckily, there's still fans to milk.