I have been playing minecraft (yes on 360's Aquatic update.), and i came up with some new ideas.
*Overhead map onscreen, (instead of having to press a button, or having the map have the top or side options)
*More Dynamic weather (Kinda like the Localized weather mod from MC) #1
*Fishing (This was an idea in the past, but was dropped).
*More gravity affected blocks. (Not just Teflon.)
*Improved death animations (I tried to replicate MCs death particles, it's just not the same.)
*Finite liquids #2
#1 (theres is an actual mod called the localized weather mod. Look it up.)
#2 (Another mod.)