Nether Portal Mechanics

I think nether portals should teleport you instantly and not teleport you at all if you sneak. It's a much cooler affect than the woosh woosh (insert leading screen and portal clipping) woosh woosh, oh i'm here. In creative try jumping though a portal, it feels like a portal, in survival it feels like it's pretending to be a portal. Also like jump through the portal to get away! Or just travel faster because it sucks when you have to go back and forth. 

You should also replace the loading screen with a cool affect that does the same job without text or dirt texture.