Unfortunately the Taleworlds developers don't want to talk about their engine or anything for that matter.
Maybe they don't want their competition to know what they are doing, or they are fed up by the more irritating, critical posters on this forum.
Whatever is the case, they really need to do more, and a dev blog would be nice.
ОК, well, It seems that in 1.5 they made ability to use our own shaders - it's good. May be later they include ability to use different skeletons(or it's already included?) and unlimited amount of animations. That would be great.