I reached Kuttenberg and the first thing I thought was Assassins' Creed and parkour.
Now, I don't have any hopes, really, because while I'm a complete ignorant when it comes to modding, I intuitively understand that it would take a lot of work(or be outright impossible without proper modding tools)... but still, I'd like to throw the idea out there that it would be cool if we could at least climb up most stuff that is at Henry's height level and below. Or even just lower walls that are at head-level.