Well, it really depends on the person you are playing with.
Personally as a NIN I would appreciate a Spear, specially on the opener, since cooldowns will be back sooner and that means more DPS from my part =-=a

Yea, some skills may get off aligment a bit but a lot of them are already like that because of mechanics... for example, seph's first sphere + rings aling precisely with my 2nd TA which makes it quite difficult to input, so it coming a bit sooner would help me place a 2nd TA into it no problem.

I also do welcome Arrow now... with Spinning Edge costing 10 less TP it really became hard to deplete soooo, yep.

Balance, always try to spread this on everyone. I only see this as a good throw on one person if that one person is outperforming the rest by a considerable margin... which usually shouldn't be the case... unless you are comparing the AoE of a SMN vs a NIN.