Greetings,
I've played only a few games of 8th edition, and have never played any earlier edition, but here are just two predictions for a new Empire Army book;
1 - Knights and Impact hits: To me it makes total sense that calvary (not fast calvary) have impact hits at the strength of their mount. It makes sense and I think this would add a lot to the current knights in 8th. Although not too powerful, I think it fits with the feel and purpose of the knights and their horse mounts.
2 - Shield Parry: With the new ogres having the ability to purchase an item that allows a parry save while mounted, it makes total sense to me that knights would have the same, if not better, training. I predict that knights will get their 6+ parry save while mounted. This would be awsome and again, a balanced, not too powerful addition that would really add to the knights and their abilities.
Well, these are just my preditictions that I think could be added and that are not too powerful, fit with the game, and would make excellent additions.
Ambrose