The nerf Nautilus actually needs.
A reduced uptime on his W. So he doesnt activate and shove before it even wears off. The shield is impossible to trade with and if he killed all your minions you cant fight when you're the only one getting busted by minions. It's also obnoxious waiting for it to time out https://static4.fjcdn.com/comments/Gt+three+days+into+their+vacation+gt+dog+is+dead+_888d4eb35899926cf3b82e90cf22a8bd.jpg . This wouldnt hurt his jungle clear I think, because I cant see the shield lasting for the full duration much, unlike a E nerf. I havent played him jungle in a long time so feel free to correct me if Im wrong. It will certainly hurt less than a nerf to his E in the jungle.
Doesn't the planned nerf on the pbe(mana nerf) force building
instead of

? Or taking meditation, or even going for a mana crystal instead of double dorans. Because I felt okay top with just

for mana.
I've actaully played as Nautilus more than I have against him so I do want him good enough to play, but even though I play him the shield is frustrating to play against.