This suggestion is only for pvp, so apologies if it should go in that forum instead.
Once the buff/happy bunker builds for ele are tuned down (or strong countered), I’d really like to see the attunement cooldown reduced. (reducing it now would make buff stacking even more broken.)
Like many people, I often play full arcane to get the maximum reduction, but I find that it’s not enough particularly when I play off hand focus because the cooldowns are much longer (because they’re more powerful abilities, of course).