Some great ideas in there. Especially like the idea of breaking with the usual "swap through attunements as quickly as possible".
Short answer: anything but hammer
Longer answer: don't really care, as long as the new spec weapon/mechanic is good in all game modes, especially WVW, I'll be content. Hammer was a complete design abomination from my point of view, and a total screw you to the Ele community at large. Even as a casual visitor to this forum it was abundantly obvious that people were asking for a new ranged weapon, not another melee weapon.
Not to mention, no attempt has been made to improve it, even after all the complaints and terrible poll numbers.