I wanted to like the cosmology way more than I did... I think the impact was lost because of what happened in the last episode of 12 Monkeys and the decompressed exploration during Wally's comic book run. The single best thing I can say about it is that they seem to be confirming, resoundingly, that Barry is NOT the source of the Speed Force. If he's mainlining it like Wally did, that, to me, is enough and more mystical and sophisticated than claiming a lab accident on one Earth created a cosmological fundamental timeless force. So I love that aspect on paper but it didn't click for me in the episode.
It's also not really evident Barry got a level-up like Wally always did after a big spiritual journey. More like a return to status quo. Barry's still not stomping a brainless Girder so he's still about where he was before. You kinda want to see Barry have his Neo / Matrix moment after his Enlightenment to prove he's upgraded.