I disagree with this quite heavily.
Ness is a medium risk high reward character. His risk reward ratio in this game is very skewed which makes him very good.
And ALL of his weaknesses from brawl were addressed. His three primary weaknesses were his recovery, grab release crap, and his problem with large disjointed hitboxes. Pk thunder now goes through opponents in the beginning, he can wall bounce, and edge hogging was removed. These three changes vastly improved Ness's recovery. Grab release stuff is gone completely. Ranges in general were nefed significantly from brawl. Practically every single character has less range compared to brawl, or if they kept the range on their aerials then the landing lag was increased drastically. All three of his weaknesses were helped tremendously.
Those are all slight buffs, imo. I'll start with recovery first since that's his main weakness. Most recovery gimps I've had weren't from people simply running into the PKT or getting edge hogged, it was from people being really aggressive offstage and taking my DJ and hitting me again out of my PKT2 to the point where I couldn't even make the edge. Also with the addition of more absorbs and reflects in this game, Ness has more of a problem with those kinds of gimps now. Also what do you mean by wall bounce? Can Ness do wall jumps like Mario, Fox, Falcon, etc.?! That'd be news to me.
Ness has also been hit in the range department on his moves as well. Even though his three best aerials are buffed (nair, fair, uair), his bair and dair got hit hard. His ground game, range-wise, is weaker too since his longest disjoint, the bat, was nerfed. Also it may or may not be true, but I feel his dash grab and dash attack seem to have less range as well. So disjointed characters are still a worthy obstacle for Ness, imo.