i dont think about the weight, in fact i usually still have trouble feeling it vibrate and i have to touch my pocket every now and then to make sure i still have it.
ive had a comment off a teenage girl before who seemed rather offended at the prospect of trading size for battery life.. but she probably also doesnt understand why i want a gamepad.. noone else, or me cares.
the part i care about is being able to use my phone, for anything, whenever i want and never having battery be a factor. its completely worry free. my ultimate device in my pocket that can always be relied upon. i quite like the feel of the gamepad with the thicker back cover, and i honestly dont think the replacement cover is anywhere near as visually offensive as many slab phone back covers which jut out in crazy places, im 100% happy with it.
you have already decided to sacrifice some form for having a gamepad, why not sacrifice a bit more form to be able to use it to its fullest extent?