Amazon Multiple shot skill progression degenerates the skill after 24 skill lvl

Hello, dear developers! At the moment the skill progression of the Amazon’s Multiple shot stops at level 25. After the 25 skill level the only progression of the skill is the greatly increasing mana cost. If the amount of fletches is not going to increase above 24 arrows then at least the mana cost should start to get reduced? the damage may start growing (above 75% of main DMG) or at least any progression should stop including mana cost. If I have 20 levels in the skill and via items I got +10-12 levels of bonuses then why should I loose a lot of extra mana for no bonuses at all, while using this definitely useful skill?
Please fix.