WOAH, WOAH, hang on there.
First of all, saratos, DJC has been in two games. If it wasn't supposed to be there in the first or second, it would have been extraordinarily easy to spot and remove. In melee, it was on several characters. DJC was NOT a mistake.
Second, NessOnett, if you're getting used to it not being there, then simply use short-hops more frequently for low aerial, because Ness will be able to do a whole list of new things with his lack of DJC.
For example: Double jump quickly in a DJC-like fashion into a spike, hitting with them, causing them to be popped up off the ground, and then guess what, you're up in the air with them in a great position to back air! Or Uair! whatever floats your boat.
Or, for edgeguarding, rising spikes/fairs/nairs will NOT kill you!
DJC has been an interal part of playing Ness, but without it, he'll still have shennanigans.
EDIT:
PS, deuceblade, Wavedashing was doing a great job of keeping non-genius players in the competitive scene. It's absence is not gonna do much "evening of the playing field" unless it's between someone who's rather uncreative and someone of mild intelligence.
Oh, and Ness may have a sort of "wavedash" which is: Doublejump immediately, while moving down and at an angle in his jump, airdodge, which will land you. If landing out of a wavedash conserves momentum, this will serve as an interesting substitute.