I'm pretty happy with Arcane right now. Don't think there ever was a class/spec that resonated with me as much, or at least it comes very close to the fun I had with fire mage in Cata (which was peak WoW!)

The only thing that somewhat bothers me is Arcane Tempo. The ability is strong, in PvE and PvP, and incredibly useful. Especially for PvP, as it serves as decent dispell protection.

... but it's such a chore to keep the stacks active.

What do you think? Would the spec play better without it? Is there another piece of the arcane toolkit that'd you'd see replaced instead?