User blog comment:GreenMoriyama/Izo, the Blizzard Prince/@comment-25235491-20160623100624/@comment-25235491-20160703123619

Good to hear you're thinking about always fixing Izo. While you shouldn't fix it if it ain't broke and I think you've reached a point where you nearly shouldn't touch him, I'm rarely right on everything.
 * P: Well, right now it's good.
 * Q: Technically, he should, but AP-scaling physical damage and AD-scaling magic damage are sort of antithetical. It is very possible, since during Hana's early design, even her physical damage scaled off of AP because Florence. So while it's definitely possible, it shouldn't be a norm.
 * W: Well, it's your design. Besides, I wouldn't be pushing for a perma-grounded area on Izo.
 * E: I think this was the skill that was "perfected" first, and quite honestly it does its job that well.
 * R: usually feels like an underground non-meta pick if you're not playing.
 * Personally, I wouldn't really care for the changes as long as it isn't too abusable or powerful. If you'd make it scale on missing health instead of max health, you'd have to increase the numbers accordingly, and that'd encourage to focus popping Hoarfrost repetitively on one person rather than popping the entire enemy team's Hoarfrost marks.