Yeah. MMA wise, with all the crosstraining that's about right. Separately, BJJ offers way more grappling techiniques and finishes, but we don't see pure disciplines against pure disciplines so often nowadays. As you mentioned, all these champions have background in wrestling, but they are champions because they use so well their wrestling mixed up with many other techniques.
The thing I highlight about BJJ is that today, it relies mainly in Demian as a pure BJJ representant. It's becoming hard to see such a high level wizard like him coming to MMA. The most of new breed, even when reaching black belt, are not BJJ purely specialists, as they train everything on the market from the start. Maia is BJJ in his core and only late added a few striking tricks to his arsenal, and a little wrestling of course, as he is no fool. So because he can do what he can using mainly his BJJ, "generations" after Royce, it speaks loud on how effective pure BJJ can be. Specially when showcased by a master like him.
Sorry 'bout the lenght. To be honest, I must say I like wrestling very much too, but I am a huuuge BJJ fan, as you noted.
I want so much to see him squaring off with the top of th WW up to Georges.