I am a mod for a facebook group for halo and we recently had a poll done of what they wanted to see in the next game and so far its a close race on things…
The full list is
Full customization of armors and emblems
Voters for this option
<ul class="_4cg3 uiList _4ki _509-"> - - +31[/list]
No req system/ earn things through achievement
Voters for this option
<ul class="_4cg3 uiList _4ki _509-"> - - +19[/list]
Emblems wearable on armor along with clan/ company emblems
Voters for this option
<ul class="_4cg3 uiList _4ki _509-"> - - +10[/list]
Armor effects
Voters for this option
<ul class="_4cg3 uiList _4ki _509-"> - - +7[/list]
Armor decals
Voters for this option
<ul class="_4cg3 uiList _4ki _509-"> - - +5[/list]
Moveable/ destroyable environments
Voters for this option
<ul class="_4cg3 uiList _4ki _509-"> - - +4[/list]
Req system but only for low level armors and weapons and have to complete commendations to get the next level of that item