Why should I?

I prefere a resistive touch screen to a capacitive.

Better is an software emulation for (multitouch) pinch gesture.
I suggest "tap&swipe"

There are more important hardware mods to do:
(Upgrade of RAM memory e.g.)

A multitouch screen is useless for such little devices.
(The ipod nano touc 6g e.g. has a multitouch screen only to turn the content of the display: Stupid!!!)