SMAAAAssssh! Well, I'm not worried weather or not he'll be cut since he is one of the Original 12 fighters. Though is there really much to change about Ness? I think he should get some buffs if his tournament results and tier placement do get worse in the future. Maybe at least give him a Fuzzy Pickles taunt.
Please fix his down air though, it has been nerfed overall from 64 to Sm4sh from increasing Startup time to down right to weakening the power of the dair even though you could of just fixed it by using a knockback growth system like most meteor smashes. What about giving back his Djc on his air attacks Mewtwo and Lucas doesn't need this as much as Ness, though his landing lag will have to be altered if you give him this. Or you can make Ness auto cancel his air attacks somewhat in the middle of active hitbox frames.