User blog comment:QuantumFeint/Custom minor rework of Leona - lets make Leona sololane more than a dream./@comment-8506165-20140906111410

You've fairly unambiguously buffed one of the current top-tier supports (currently the most picked according to lolking, banned less than Morgy though) when she's already arguably too strong with the highest support winrate besides Janna, who's somewhat niche. If you want to add this much into her kit you have to actually introduce a meaningful tradeoff, rather than just "slightly less Sunlight damage" and "20 less base damage on Q at max rank".