Nautilus change is a massive nerf.

His only gap-closer is now uniquely countered by a handful of champions, and the few really cool plays he could make while being on the same team as said champions(especially Jarvan) no longer exist, nor are replaced with anyhing of comparable value.

I really hoped he was left unchanged on purpose, and not by omission, but I guess I gave too much credit to whomever made the original call on those changes(which are awesome, for everyone except Nautilus).