Incest was a thing in more than just FE14 if that's what you're referring to Joshua. It's certainly a part of FE4 and many would argue that its a theme of FE8.

Axe defeats lance because with the notch, you can catch the incomming lance, effectively disarming your opponent

I can't make Lucina dig deeper into her daddy issues so it's not even worth it

I think the quasi-incest was only in one game, and only if you were into that sort of thing. Or didn't know what Supports did, and just sort wandered into it while trying to watch the siblings be friends.

Yes I'm so sad about the weapon triangle being gone. :(

You know what's fun :D ?
The triangle weapon has been removed in Three houses