My Thoughts on the Luden's Changes
Luden's Echo is undoubtedly one of the most powerful items in-game. Offering 120 AP and an incredibly strong passive, it rewards nearly all types of champions - burst assassins benefit from the extra damage, while sustained DPS mages can charge it easily. It's even a staple pick on long-cooldown mages who don't seem to synergize with the item.
However, I disagree with the methods being used to nerf the item. AP Ratio on passive being nerfed from 15% to 10%. That's not the problem. The problem is the 100 base damage which provides a massive early-game powerspike to all mages. It increases their poke combo by damage early. Hit that instead so that Luden's finds more of a niche on late-scaling DPS mages and doesn't fall off lategame.
Charges gained from casting a spell reduced to 10 from 20. I think this is a bit heavy-handed, considering the fact that spellcasts are on a far longer cooldown than basic attacks, and players should be rewarded for alternating casting and moving, not merely walking around and throwing poke. Maybe hit it to 15.
EDIT: Thanks to Vistha Kai for catching my weird mistake. Sorry, wasn't entirely concentrated when I typed this.