You have no evidence that Paradox has been "more successful", nor that they're "more trusted" or "more respected". Perhaps you feel that way, but your personal feelings are personal. It's been a while since I've posted on the Paradox forums, but I remember quite a lot of anger, distrust, and outright hostility toward the developers. In fact, the head of the studio had to come out and apologize for releasing bad content for a couple of years and promised to do better in the future. They had to spend an entire year fixing bugs in EUIV because the game was so buggy and bloated that adding new content just broke more stuff.
I'm not anti-Paradox, really. I enjoyed EUIV for a while and Stellaris was fun, too. But let's not pretend that Paradox is some kind of model to look up to. They have plenty of their own problems. If I had to choose between the Paradox model and the Firaxis model, I'd choose Firaxis every time. Well, pre-NFP, at least. The NFP stuff started to get a little too Paradoxy for me.