As small of a feature of having the headphone jack at the bottom may seem. It actually makes quite a difference.
I use my headphones a lot. And I forgot how convenient it was having the jack at the bottom, until I switched to the note 4.
The wires is now drooping down over the phone, which is more annoying then you think if u use headphones a lot. And I usually put my phone in my pocket top down naturally which now I can't when using headphones.
For people who don't listen to music or talk on the phones with headphones much, I can see why the feature is meaningless. But for me it was a huge difference.
Yes I also agree putting the phone in your pocket when the jack is on the bottom is so much more comfortable when you take it out of your pocket. Again, not a deal breaker and my ONLY Note 4 complain. It can get rather annoying having to fumble with the headset wire to move it from dangling over the screen OR in the camera's view. Wouldnt have that problem if the headset jack was on the bottom. Anyway, will try out some Bluetooth headphones soon.