My assumption is by that change alone you made some of the long type bows more useless, and the faster shooting bows were buffed indirectly because they can get off more shots aiming at the head?
Actually, it was a balanced nerf for archery :
-long bow did much body damage, does less now, but still decent. Headshot kills.
-rus bow is a good overall bow. Body shots are sure to stun the target, headshot kills.
-Horn bow is a low damage bow, high speed. Body shots are close to useless, but more attemps for headshots.
All in all, it's pretty balanced.
And for an HA, going close range enables some decent headshots probability.
Problem with Veleno was, he's a faraway Horse Archer, rarely ever goes in melee range, thus does 90% body shots with an horn bow. So yes, he got nerfed. But he could easily change that by actually using his horse as a tank, going close enough to headshot easily, etc... But no.
Another possibility is, he got fed up of Horse Archery, wants to respec, doesn't want to loose his level, took the silly excuse of an archer nerf to ask for a free respec, didn't get it. Came whinning on the forum to have the sympathy of the community. Surely didn't get it.