For what it is, you expect it to have more range (especially 1st and 2nd rank).

I have gone for ganks where quite literally I have been in a Tri-bush going for a gank bot lane and it still cant even reach in.

Now that's just one example, but overall I think the radius is too small for the earlier ranks especially..

His ulti is fine, considering if you connect your ulti you have a 70-90% chance of getting the kill its perfectly reasonable to have the ulti low range in early game, especially during the lane phase. nocturne is a great ganker, he needs no buff to help him tbh.