Nunu Rework and Ideas

So ive seen that nunu is one of the best junglers and always will be due to his q and amazing jungle clear. But anything out of the jungle is lacking, from boring mechanics to only 1 normal move being useful its hard to even play nunu. Frankly, hes just not a character at the moment. he has low pick rate and is barely seen in competetive play. I think he Needs a rework.

My concepts for nunu are pretty simple but effective in the same way. P= Every 7 attacks nunu gets a snow storm stack and 1 non mana costing spell which does an extra 20 magic damage that scales with level. Q= Snowball - consumes 4 snow storm stacks and throws a snowball that slows for 45% over 1 second and deals 60(90)(120)(150)(200) with scaling ap and snowball stacks. (if nunu has only 4 or more stacks the spell uses no mana. if he has under 4 the move costs 80 mana.) W= Enraged Yeti- Nunu's next 4 auto attacks generate snow storm stacks and deal an extra 30(40)(60)(100)(150) damage scaling with ad E= Seismic Slam(over used name but couldnt think of anything else that described this move) Yeti jumps and slams the ground with a knockup effect and deals 60(70)(100)(125)(150)(200) dmg and scales with ad R= Behavior Spike- Yeti loses control and goes on a rampage consuming all snow storm stacks and cannot be hit with crowd control, Auto attacks and empower and gains 20% lifesteal for 4 seconds. All normal moves become movement speed boosts. (kinda like sion passive)

I have no artwork for this concept yet, but I hope someone from riot sees this and gets an idea. I'm a very creative person who is currently looking for a job so riot hit me up XD. Builds that would work on this new nunu: If nunu got something remotely close to this he would be an actual character in the game again. I believe that he would become a very good champ that would fit with the current meta. I think he would be a mid game fighter with good damage.