Aren't they removing it for space and you get better audio quality with the lightning connection?
I know it's not a popular move, but those are the reasons right?
I think they are removing it because the design team have their heads up their asses. I have some very nice Shure headphones that currently work with my iPhone, iPad, laptop and desktop. Basically anything i want to plug them into, without the need for any kind of special (expensive) adaptor. Removing the headphone jack is about as useful as putting tits on a fish.
Apparently the audio quality is supposed to be better. It might be in a lab environment, but try it on public transport and I bet nobody could tell the difference, especially on those crappy Apple earbuds. Somebody needs to go in and whack the design team with a piece of 4 x 2 and get them working on producing updates for the entire Mac range instead. Or maybe they should concentrate on making more watch straps that are too short? That's a good use of their time.