I would love for the cap to be 100. Not only is it a nice visual to see 100/50 rather than 99/49, but I also feel super jump as a subjob ability would make it easier to manage the ever-increasing enmity we are gathering from our equally ever-increasing damage output. I'm not sure the enmity system was designed to handle the kind of damage players are dishing out now, and without going into an enmity discussion better left to it's own thread, super jump would provide away to regulate spikes in enmity.
There are also other considerations like the addition of magic attack bonus 3 to /blm makes it the premier nuking subjob over once again /rdm and divine veil makes white mage a better sub for healing over /sch. It just seems like it would bring a sense of identity back to some of the subjobs.