I've just noticed this.
Before the TG DLC when you are mounted and stand still, your horse had some random idle animations. Like bowing head, shaking ears, making breathing noises etc.
Now it is all gone, they just standing still with mindless grin.
(I am talking abound normal 40k gold horses from the stable, dont have crown store ones)
" Multiplayer? M'aiq does not know this word. You wish others to help you in your quest? Coward! "