Did you play Akai Ito first? It's the first VN in the same universe and I think it is overall better, especially for the yuri. It also explains a lot of concepts that Aoishiro relies on. Of course some routes are just better than others.
Furthermore, did you rely on the fan translation? It is much better than the official mess of a MTL.
I was using the fan translation. It was pretty solid.
This is the first time I've seen anybody describe Akai Ito as a prerequisite of sorts for reading Aoi Shiro, but then again I haven't seen that much discussion about these VNs. I would've gone with Akai Ito first if I had known.
I decided on Aoi Shiro first because:
1. The fan translation was completed as opposed to the ~90% for Akai Ito.
2. I liked the MC's design...which in retrospect was a stupid reason since you never see the MC except for a CG here and there. You'd think having read several dozens of VNs that I would have realized this but I can be quite thick at times.
3. I had read somewhere that the yuri was slightly stronger in Aoi Shiro. I should have asked in this thread first so I could've had that misconception cleared up.
Ultimately what stalled me on the VN was that the yuri was lacking. I found the actual story to be relatively engaging and the cast quite charming. The somewhat dragged out SoL scenes didn't put me off either. They weren't a chore to read because it peppered in a decent amount of banter between the characters.
But that lack of yuri...
I was most optimistic about the first 2 routes because they seemed the most viable as love interests for the MC. Since the other 3 are A blood related relative, some form of supernatural creature, and a child. The last one is particularly demotivating since it seems to be the True Route.
Yasumi the kohai's route is the closest to romance, but there's only a vague acknowledgement of feelings for her by the MC and the ending is "up to interpretation" on their relationship
Migiwa's route isn't particularly romantic despite there being a kiss. And in the ending they are literally just rivals without even the benefit of "up to interpretation" for their relationship to be anything more.
If I could ask you about your first page list, why do you have Aoi Shiro listed under "VNs with Yuri focus" and then Fatal Twelve under "VNs with majorly Yuri content"? Because personally I'd either switch them or put them both in the latter category.
Admittedly I haven't finished the other routes for Aoi Shiro (but I'm expecting less, not more yuri in these routes) and it's been awhile since I read Fatal Twelve.
Both VNs have a main plot that drives the narrative with any yuri secondary. At least Fatal Twelve has an explicitly sapphic love interest who makes her interest in the main character clear at several points throughout the story, which is more yuri than what I saw in Aoi Shiro.
Also, don't they get together in the end, or am I misremembering? Which is definitely more yuri than Aoi Shiro. In fact it's a bit of a sore spot for me as far as Aoi Shiro's concerned.
But perhaps there's some unexpected hidden yuri in the remaining Aoi Shiro routes or I'm misremembering Fatal Twelve?