Shouldn't Nocturne's Ult should have a shorter CD in the early levels?

First off I'd like to say I love Nocturne.

The spooky ghost has always been one of my favorite junglers to play, but I find the change in other junglers through a meta perspective has really left him in the shadow (hehe) of other junglers that do his job better.

Take for an example is unique defining ability "Paranoia" - at level 1 it has a 2000 Range, 150 Physical Damage (+120% AD), and a whopping 180 second CD. Compare that to another gap closer jungler ult like Vi's "Assault and Battery" at level 1 has 800 range, 200 Physical Damage (+140% AD), and a 150 second CD.

Vi's ult has more utility, and damage with less cool down. Yes, Vi's ult does have less range, but with her fully charged Q into her R it's very comparable to range of a level 1 Nocturne ult.

Overall I find Nocturne's ult early game very lackluster. With such a high Cool down it makes me want to savoir it and use it less. Where Vi on the other hand I want to use every time it comes up, the sooner the better. That doesn't feel like good game play to me as a nocturne player perspective.

In the meta I do find Nocturne and Vi fit similar roles, but not exact. That is why I used the comparison.

I also didn't take in the global blind Nocturne's ult gives the enemy team. But I don't see that justifying a 30 second more CD, especially since Vi's ult is stronger, stuns, and can damage multiple enemies which Nocturne's can't.

I have been playing League for several years now, I do consider myself experienced but sometimes I can completely be out to lunch on certain balancing choices as I find a lot of people are.

TL:DR I would love to know the reasoning behind Nocturne's high level 1 ult CD.