They can't just change code. Buffing the timers for PvE will also bump them up for PvP. It's a balancing act. Changing one affects the other. The only way to have this not happen is the have been scaling them separately, which isn't something they can add in so close to launch. Something like that would take a rework of the system. Day 1 patches don't usually include a total change of the core systems of a game.