Hey,
the bows in Kingdom Come lack just a few things to be very accurate.
Sorry for being so nitpicky but you want to make an accurate game, so I thought some info might help.
Also, some people might find it interesting what bows really looked like during that time.
1st The cross-section of the bows don’t seem to be D sections but rectangular (I’m not completely sure though because it’s hard to see from the videos)
Here is a cross-section of a bow found on the famous ship Mary Rose: http://www.archers-review.com/images/845.jpg
Pretty round and D shaped.
2nd Now, this is my biggest problem, bows in the middle ages didn’t have leather grips where you grab them, it was just plain wood.
Examples:
Manuscript around 1400: http://manuscriptminiatures.com/media/cache/manuscriptminiatures.com/original/562-21_large.jpg
Manuscript 15th century:https://upload.wikimedia.org/wikipedia/commons/2/24/Battle_of_crecy_froissart.jpg
Mary Rose Originals: http://www.maryrose.org/wp-content/uploads/longbows1.jpg
3rd Side nocks
Bows of that time had nocks on the sides instead of the back of the horns.
See: http://warbowwales.com/communities/0/004/009/712/490/images/4558533540_525x566.jpg
Some of them had double grooves on the nocks, to get the string on. Probably all heavy warbows because it’s impossible to string them without a stringer.
A lot of the bows of that time weren’t very straight either, they were simply made by taking the bark off a tree and then shaping it along the natural grain.
Here is a replica:
http://kviljo.no/bue/115/3.jpg
http://kviljo.no/bue/115/1.jpg
Again, from the Mary Rose find because they’re probably the only source of surviving bows of around that time.
Manuscripts:
South Germany around 1400: http://manuscriptminiatures.com/media/cache/manuscriptminiatures.com/original/562-4_large.jpg
South Germany around 1450: http://manuscriptminiatures.com/media/cache/manuscriptminiatures.com/original/950-35_large.jpg
Germany 1441: http://manuscriptminiatures.com/media/manuscriptminiatures.com/original/1563-63.jpg
The arrows look really good already 
Cheers!