I know SE (and everyone else pretty much) doesn't care about Ballista but....
scaling of player damage may need to be adjusted for uncapped PvP, because power of gear as been increasing drastically while player HP, defenses and resistance have not.
One thing that would help this a lot is revealing an actual item level (something the dev team mentioned a lot in regards to newer items) and actually scaling the newer gear down to "level 99" if their effective level is higher.
I don't think I want to be hit by a weapon skill from the delve boss polearm. :p
(PSSssst... please, please, please do SOMETHING to improve ballista. Even something really small like making the license quest optional and changing the schedule would help a LOT.)
I know most people don't care about this and I'm sure people will tell me "screw you, it would divert resources from <insert not ballista content here>." This is more of a dream / wish than an actual expectation.