My biggest issue was the flipping of utility skills and the way it works with F2. I may have needed for time with the spec, but the flipping and F2 seemed to be fighting with each other. I was frustrated getting everything to the right skill I wanted while try to flip and keep endurance up. Mostly because of balancing Cooldowns, Endurance, Energy and different skill sides.
I think it would be much cool to remove the flipping and instead for the first time giving Rev the ability to choice utilities. You would want to add something more to the to the F2, but I do like the way the endurance works with the leap dodge.