Personally I find the game in a perfect spot for difficulty. The bow isn't really overpowered if you use it normally. With death skill loss most people will probably have a bow skill of 50 or less when facing Yag... after that most people will stop playing and wait for new content.

Only the hardcore lovers of this game will keep playing at that point. And game balance should not be designed around the few that won't stop playing or need to min / max skills by shooting rocks or using a lesser weapon for more hits.