I'm fine with the screen the way it is, maybe a slight increase 3.7 maybe.
A new camera is always welcome but not needed
Quad Core is pointless without optimization. Since they just got into the dual core (phone wise) i don't see them making the jump to quad just yet.
Honestly, i'll just buy it because its a iPhone, but i guess i could offer something of what i would want.
Even though i despise the battery drop i would at least like to be able to harness LTE when i want it.
At least 21 or 42 hspa+ if not LTE.
NFC
Solar Panels to charge my phone on the go
LED notification