So, if you look at real life castles, there many instances where the masons just merged the walls directly into the keep.
I am saying that we need to be able to have walls and palisades to snap to the corners of keeps, and for palisades to snap to the corners of outposts and wooden forts.
This would actually be a nice idea. At least then a castle/ keep can use the oil attack also compared to if you build it on your side of the wall. And better range. But I suppose it will deviate even more from the AoE2 formula then. This is not a bad thing, but I think the devs wanted some familiarity with AoE2, among all the improvements/ changes.
Great idea but I think it will be cosmetically hard to work on.