Gracie JJ was just a cunning way to rebadge Judo newaza. If an Olympic Judoka focused on his newaza he would be equally match to the so called Gracie JJ (Judo) as seen by Yoshida in his matches with Gracie.
Rebadging martial arts and calling them your own is a good way to make money and start a school.
Gracie was great at what he did - for a guy as small as him to take on bigger fighters and win was amazing. Its not street self defense though to sandbag and wrap someone up on the pavement unless you want a kick in head.
Geoff Thompson is probably the best self defece specialist I have seen and he doesnt even involve martial arts at all in his talks.
Kinda sounds a little like Professor Kano, and those before him, and those before him...and...don't the Gracies all include Mitsuyo Maeda, a seventh Dan Kodokan teacher in their lineage?
I'm also pretty sure GJJ has a great deal of Nage waza along with Katame waza...
FWIW, Relson is very adamant on how important it is to stay on your feet in a self defense/street situation. It's something like; "Move your head, close the distance, get kuzushi, THROW, and then get out of there."
Why do people always insist GJJ or BJJ exclusively focus on Ne-waza?
Not trying to give you a hard time here, but why not try some personal, hands-on research?