Absolutely.The fact they nerf single target burst but they give more mana, further strengthens the notion that this expansion tries to make all specs as flat as possible in capability. Arcane was way too good at burst DPS and it appears they try to moderate that (especially since the highest sustained damage talent on row 100 will likely be the slow-building Quickening). Similarly fire appears to be getting very reliable single target DPS and I'm pretty sure they intend for its AOE to be much lower.