...would asking for justification be too much? I can see maybe three moves being abusable (Rock Smash, Bike, Egg Roll), but none of these are broken in the least.
Diddy's peanut gun does minimal damage, does not shoot in a straight line, and is incredibly easy to avoid. Spammable like most projectiles, but not broken.
Rock Smash has such horrific range/startup that if you get hit you deserve to take the 30-40%. Not broken.
The bike can actually work out worse for the user if they fall off and are separated from the bike. This deprives Wario of any additional horizontal recovery beyond two jumps/fully charged Waft. Also, depending on a number of variables you can potentially fall off the bike after turning around once or even colliding with someone, and there's a period of about a second at least before you can get over to it and get back on. It's too unreliable to be abused and is most certainly not broken
Umm...are you referring to the huge attack range someone has with Egg Toss? Factor in that the eggs always travel in an arc concave downwards, that although knockback is good damage depreciates quickly, and that the eggs themselves are so small and fast you can airdodge all but maybe the close-close range ones, and those can be teched/roll dodged. Space properly on a Yoshi and dodge the eggs; he'll have no choice but to advance and be punished. Abusable, but not broken.
Egg Roll will be abused by n00bs just like in Melee. Tactis have not changed. DO NOT ROLL DODGE. Merely jab or shoot one projectile. SH'd d-airs work wonders. Cheap by moron standards ("Is gay!!!111 cans not hits egg!!!!1111"); neither abusable nor broken.
Ice Climbers' projectiles are only a nuisance in purely horizontal stages and are nullified by any high platform. Even when desynced, it isn't that hard to powershield/reflect/absorb/spot dodge/JUMP. Situationally abusable, but not broken.
The only move I would consider broken is Diddy's bananas, but that's merely stemming from the fact that the game developers decided to make a move out of the most ******** and unnecessary gameplay mechanic in history.