Can you Change the Way Arcane Power Work

[Umbralpixel.9305]

Please can you make it so instead of next four hits critical hits three seconds of definite critical hits.

Or if not possible, if you could give ten second of fury and a lower cool down. Because unlike other professions we don't get too many offensive boons from our utility. Some get multiple boons in for example, the guardian class. I don't want nerfs, but it would be nice to have access fury. or could you make

 

Arcane Power ammunition hopefully three stacks....or two with same cool down. but hopefully two sec of definite critical hit. Thank you