The original intent of the "fix" from v 1.0.0 to v1.1.0 was to prevent people from using "breeders" as farmed creatures, to prevent skilling. People were farming "w" or "d" to get nice, very quick weapon gains and shield gains.. then this came along, saying "the more you kill of creature "x", the tougher creature "x" gets.
This had the side-effect of making common summons, such as "w", "d" and "S" become extremely unmanageable, and makes Melee-type characters handicapped, as magic attacks don't suffer like melee attacks do in this case. It's the reason I enjoy playing 1.0.0 and not 1.1.0 more than not.. I was hoping 1.1.1 would fix this, and just reduce weapon lv. gains and skill gains without increasing monster exp lvs but.. nope, TB never touched on this issue.. I'm hoping for 1.1.2 or 1.2.x versions this will be addressed, because as it stands, melee type characters are over-classed by jackals, worms, and spiders where archers and magic users have easier times.