Does anyone else think Nunu really needs a rework?

I've just been thinking about who should get one and Nunu came up. I think he has Sion syndrome where, at first glance, his kit doesn't really seem to blend together. I know that his kit has synergy; his W steroid lets his passive come up faster, thus more free Ice Balls or Consumes.

I also know that Riot did buff him to get those temporary buffs based on what monsters he's recently Consumed, but I'm not sure how effective those buffs actually are.

Considering that Trailblazer essentially works like Consume does, healing the jungler on cast, it seems a bit outdated. Of course, buffing it is out of the question, because we all remember that one patch (I think 3.7?) where Nunu's level 1 Consume outdamaged level 1 Smite and every enemy jungle ripped their hair out from the buff steals.

I'd also want to mention his ult; it definitely LOOKS good on paper, but then you realize that A) No damage happens until he re-activates it, someone interrupts the cast, or he actually finishes it (which maybe happens half of the time? Less than?). You can also see what he's building, and if he's going tanky over AP, then the ult won't even hit that hard. Add in the long list of moves that can stop the ult, and it just seems very sub-par.

Eh, I guess most will disagree with me, but Nunu seems to be either broken OP sometimes or never seen at all.