In all my dealings with the SEC (from working at multiple regulated investment platforms, AngelList and Republic, and now as a VC), it's become clear to me that they're extremely pragmatic and want to support innovation and create a level playing field for everyone. They have great intentions, but are obviously quite careful and conservative about their approach.
I think it's important to note two things:
1/ The stated mission of the SEC is "to protect investors; maintain fair, orderly, and efficient markets; and facilitate capital formation." — the last part is important, and these changes go towards furthering that goal.
2/ The SEC is a civilian enforcement agency. They do not write the rules, they are here to interpret them and enforce them. They issue guidance, monitor, and sue entities that break the rules. The rules are written by congress. Even if the SEC wanted to change a rule, they could not do it without following the laws written by congress. At best, they can slightly tweak their interpretations of the rules (as we're seeing here).