Call to Arms BG to be available throughout the whole week (Wotlk)
Currently it's just Friday to Monday.
It wouldn't do any harm, and would promote more PVP options, especially for people who instantly leave when they see Alterac Valley and Isle of Conquest.
Reason for leaving is mostly FPS limitation, one guy said he has 5 FPS in Alterac Valley and he had to leave.
It used to be that Call to Arms was available every day and every day it was a different battleground, if my memory serves me well. It was nicer than the current system imo.