User blog comment:Myydrion/Nunu Rework/@comment-5588011-20150330181217

Nunu's passive is fine really, it allows him to sustain himself before his first mana purchase and allows him to take objectives before his first back like Rift Scuttler.

Q is now turned into a slow or a stun, and also does damage, and also a free SCALING Smite that also can do percentage health damage. This means late-game you're basically guaranteed a free objective steal even if they have Smite.

Nunu's W while it may not be the best thing right now but it balances his immense counter-jungling presence and objective control, to give him an AP ratio skill that is a knock-up is actually going to make him a constant top-tier pick.

E - No slow? Nunu's game is counter-jungling the crap out of them and then in the late-game being a CC/objective-control bot, if they come then you run with W and slow with E. With this you changed his gameplay.

R looks boring, at least if you build full tank as Nunu you had CC in your R.