Nautilus Q idea
Instead of pulling to the middle, Nautilus hook should pull based on champion size, so a yordle will be pulled almost all the way towards Naut, but hooking a 10 stack Cho'gath with Elixer of Iron will make him barely move and pull Naut towards him. I'm not sure if this would be possible with the current way champion size is implemented in the game, but it would be a cool idea.
Also I think Naut could use some QoL buffs with his Q hitting terrain. Due to the cast and pull time, it often feel no faster than just walking unless you used it from maximum range. Maybe he gets 10% move speed for a few seconds after he pulls himself in or something like that.