Your quote that I put in my post above is EXACTLY what’s not true. I do understand it; I may not understand it on the level of say, Infil, but I do understand how the game works on both a fundamental and technical level.
Sigh
So. Aganos’s Ruin is a manual now? How does that switch up his game plan?
I don’t think anybody wants you to stop posting things you find, GG, or anything like that. It’s just helpful if you take a more pragmatic approach. “Hey guys, I found this, did you know about this and do you think it’s useful?” is better than “I may have literally just broken the game, get ready to have your world rocked.” When you say that second one, people are expecting some really crazy stuff, so if you’re unsure whether your tech is that crazy, it’s best to just show the tech and have an honest discussion about it. Just some friendly advice from someone who has been discussing others’ tech and sharing my own tech in fighting games for a long time. 
I’ll answer a few of the questions in your post way above.
Yes, every jumping attack (special or normal) is an opener. You can immediately break the next attack after you’ve been hit by any air attack, including the second hit of target combos (like Sadira, or Cinder canceling into d+HK).
Grounded normals aren’t openers because canceling into special moves is a staple of SF-esque fighting games and I guess they didn’t want to remove that aspect of the game by making everything breakable immediately. Air attacks are weird… they trigger the break system but they’re kind of only “partial openers”. You can do auto-doubles, but you can’t do linkers, enders, or ultras right away without some other attack first. Everything is breakable but you get non-linker, non-ender versions of special moves when you land after it. I think it was an unintended effect that just continued to exist and now we’re used to it.
My guess is air attacks trigger the breaker system because otherwise you could get jumpin, normal, shadow opener unbreakable and it was probably too much damage for an easy hit confirm.
I think the whole opener jump ins thing is just to keep the game as simple as possible. In some games you have to worry about how high or low into your jump arc you hit someone to determine which combos you can get, in KI it really doesn’t matter unless you’re going for something fancy outside the regular combo system.
Wow has this topic generated some flags. I think were past it all now, but just in case I’ll quote @Infilament and his wise words on this subject:
A motto I try to bring to any message I read: assume good intentions
Requires some interpretation sometimes, but it’s a good general rule.
I didn’t mean to cause trouble with this thread. I genuinely thought people would be happier knowing Aganos can make Walls mid-combo. Didn’t think anyone would flag my thread.