User blog comment:Commander Marko/Custom Patch Notes (Again)/@comment-5235176-20150715212446/@comment-5235176-20150716162245

You increase his mana cost, ¿but you increase his critical strike use by making him waste his mobility and waste tons of mana to critical strike with his Q? I don't think so.

Kog is now played as AP, as an AD he's too weak because of his 0 mobility. He cannot critical strike with the base damage, in exchange, you make him able to critical strike with the bonus damage on W, but you reduce it, so in average this damage stays the same.