Japanese seem to view it as a way for revolutionising anime fans to be more comfortable for two girls to be together sexually or not?
It's not a Japan x West thing. When Nakatani said she liked Hibike as yuri, a lot os japanese people sent messages to her saying Hibike wasn't yuri. On the other side, a lot os western fans still see it as yuri even though Reina clearly loves Taki.
It's yuri with Asuka to me...
Regardless, I do think that things like Precure help to normalize relationship between girls with romantic undertones. Some more than others. Look at MahoTsukai, for example. Riko and Mirai are shown as husband and wife on official art. Sure, people will just dismiss it as a cute joke, but I do think it might make that image more normal in their minds. Their relationship in the show itself it's pretty romantic, too.
Even more than that, I think they can be a good representation for homosexual girls who are saturated by just straight couples elsewhere. I mean, there's a reason why Precure is so popular between female yuri fans in Japan, after all.
Then there was Shuumatsu no Izetta which subtly presented its yuri without typically fetishizing it or being made light of. It seems both potrayals brought its own fair share of dissatisfaction by noth parties.
I think both Izetta and Flip Flappers were really well received by yuri fans in west. Most place I followed discussions about it, people were satisfied. There were some people who wanted more intimacy, but that's a rare thing in anime in general. FliFla's director already said the work is supposed to be yuri and thinking anything other than that for Izetta just makes no sense, too.
Honestly I don't see much difference in the amount of yuri in shows back in the days like sailor moon and shows now.
Now that's just wrong. Be it subtext or full yuri, there's way more of it now. At that time it was hard enough already to find yuri manga. Now, Yuri manga that didn't end with them dying or marrying a man was almost impossible. Give a tour for older yuri mangas in dynasty. You'll realize that the most you go back, the least yuri they become.
The first yuri related magazine came after 2000. Most yuri authors are really new and they were inspired by things like Sailor Moon and Utena in their infancy.
Sailor Moon and Utena were pretty much the only yuri you could find then (and Sailor Moon was only one couple), everything else was just fanservice. Sometimes maybe something like Yamibou, that would end in tragedy and het.
Even subtext was nearly zero, since shows without male lead were rare. And the ones that did exist would show the main girl going after some guy or lots of them.