User blog comment:GreenMoriyama/Izo, the Blizzard Prince/@comment-1330314-20160405115322/@comment-3391671-20160407042640

The kit is always a WIP; that will remain unchanged as long as the kit doesn't feel exactly right. Even then, I do not wish to move it around too much, or else it'll get motion-sick from all the movement.

Jokes aside, I thank you for the compliments and wish for you to hold it back until Izo's immenent thematic/backstory rework. Some of it will justify his kit, while other parts of it will identify Izo better. As for future kit reworks to come, I hope they will be well and appease your thoughts of how they do or do not work well in his kit.

Will respond to the below (recently, my posts do not register if I take too long to write them out initially)
 * Frozen Edge looks like a fine passive. The AP ratio on the slow looks a tad high (you'd go to 100% slows and over at 750 AP upwards), and the cooldown is probably also a bit too high, but that's nitpicking numbers on a custom champion concept.
 * Crushing Bolverk looks a little out of place on Izo. It's basically a ranged autoattack, except it a) deals physical damage with a reduced AD scaling for some reason, on a champion who otherwise should be building AP, b) extends Frozen Edge's duration, despite the more natural use for it being the initial application, c) heals him by hitting minions, which isn't something you'd normally want to do unless you absolutely want your champion to last longer in lane, and d) resets Izo's autoattack timer despite already counting as a pseudo-autoattack reset. I feel you should probably redo this ability, as it currently looks fairly muddled and out of sync with the rest of his kit.
 * Frosted Coating providing shielding and a slow is appropriate on an ice-themed bruiser, but I think the slow is sort of backwards: shields generally incentivize opponents to attack them usually by providing buffs or debuffs until broken, but this particular shield discourages enemies from hitting Izo, which risks leading to lose-lose situations for his opponents. A likely better implementation would be to have Frosted Coating give Izo better CC capabilities while the shield holds, for example by having his own basic attacks reduce Frosted Edge's cooldown against targets or even grounding nearby enemies.
 * Glacial Spire looks fantastic. No complaints here.
 * Field of Rime looks fairly underwhelming. The slow is minuscule and redundant in comparison to Izo's passive, and Hoarfrost, which looks like a one-time effect, doesn't really add much to his contributions. I think you could do a lot more with this. One potential alternative, for example, could be to turn Field of Rime into a sort of ice skating rink that would modify the movement of enemies within, giving them turning speed and momentum akin to sliding on ice that would hinder their movement.