As you've guessed, it only affects how close to the enemies you have to stand, not the size of the powers AoE
Icelock - Ice/Storm Controller
Command Bot 1 - Bot/Traps MM
No, but slotting cone powers with range increases their aoe.
There is a cap on the number of targets that can be effected anyway (16 for an aoe, 10 for a cone).
I really should do something about this signature.
Ah thanks, I'll get rid of them 
My only cone ( terror thing) has a stupidly large cone anyway :P (I'm sure it's almost 180 degrees 
)
I've tried slotting range in my total domination/telekenesis/mass confuse int he hopes it would increase the are over which the effects occur. Does it do this? I've removed it from my mass confuse and telekenesis but have left it in my total domination atm.
I think it only affects how close you must be to activatee it, can anyone confirm this?