Idk Eagleye (btw, how long has there onyl been 3 Es in your name!? WTF.), there's actually a lot that got worse for Ness from my views.
Dair, fair, dash attack, PK Flash, Magnet, utilt, usmash, and fsmash all got nerfed in overall usefulness.
It's always been that way. Everyone just adds the extra "e" in the middle because mind-tricks.
--I agree DAir is much worse than before.
--FAir was pretty good in the last game for different reasons; it had huge range and a smaller amount of landing lag than it does now. FAir was more a defensive option then, but because of the changes to multi-hit moves in this game it became more of an offensive extension because hitting with the move is essentially guaranteed to chain into the final hit of FAir. It lost damage, It lost range slightly, and because it has more landing lag it makes landing with ness slightly harder (without taking into account UAir and NAir out of an Airdodge). In some situations it is betters and in others it is worse.
--Dash-Attack I don't really see much difference. It launches opponents a bit higher on the last hit and doesn't combo into itself very easily. The comboing into itself wasn't ever really consistent in Brawl either. One big dent to this move is Rolls being such a great defensive option, because the sparks don't persist long. It is a slight nerf mainly because of rolls. Otherwise it's slightly better in this game if we hit due to our UAir/FAir/PKT being great at juggling and extending combos.
--PK Flash. I don't see how this is worse. You might need to give me a reason. It could be that because other characters can recover so safely and unpredictably that it's more difficult to land. Otherwise I feel it's better un-charged because the cooldown lag isn't noticeably bigger/smaller, allowing for aerial followups. It's not like this move was a game-changer to begin with though.
--Magnet sucks too. No stall, no movement tech, no real use except against energy projectiles... and the bat reflector is much more useful in most situations.
--Utilt. This is another trade-off type move. The upward hit has more disjoint, but we can't hit as close horizontally. The disjoint has helped me in covering some characters as they tried to reach the ground, but there have also been cases where the horizontal shrinkage has hurt as well. I've been able to combo this into more utilts or NAir/UAir pretty consistently, so I don't feel the changes are super significant. It doesn't kill nearly at all anymore, which might be the biggest reason for its nerf.
--USmash. No charging hit is a pretty big problem. Also, its spin around Ness' body is super slow. Those are obvious nerfs. The fact that it hits behind you at the start and comes out pretty quickly is a slight buff because you can use it out of shield or to catch people dropping to the stage. This move is nerfed, and NAir basically filled the role of useful OoS options, so labeling this as strictly worse makes sense.
--FSmash. The reflecting properties in this game help a reflected projectile to actually hit more often because the speed increases. THAT SAID, FSmash has about the same range as FTilt, Is very hard to reliably tipper, and is outweighed by almost all other options as kill moves. This move is worse as well
A summary of what I said there:
Agree on DAir
FAir is different, though not strictly worse
I don't see a difference in Dash-Attack
PK Flash barely mattered, and I feel it's better uncharged than previous games
Magnet sucks, I agree
Utilt is different, though not strictly worse except in KO potential
USmash is worse
FSmash is worse, though it reflects better
Another point to bring up after considering these nerfs:
Why are so many people picking up Ness and placing well with him now?
I see the following answers:
a.) The metagame hasn't developed enough, and the buffs that Ness did receive will not be good enough to sustain himself throughout the course of Smash4.
b.) The buffs he received are big enough to outweigh any potential detriment of what nerfs he received, and those buffs will shape how Ness plays throughout the lifespan of Smash4.
c.) The buffs and nerfs counter-balance themselves and shove Ness into a niche role as a decent character that can win SOME tournaments, but not consistently.
I'm personally holding out for b.). I don't disagree that some of his moves were nerfed, but the difference in mechanics of this game as well as the minor positive changes he received have changed his most beneficial playstyle ever so slightly to give him an advantage for the release time period, and those nerfs haven't had a major impact to that style of play yet.