I doesn't help that Zelda's design is absurdly offputting.
On the topic of offputting designs, I went back in and looked at this, colour-coded for the kind of change and the degree of intensity some individual changes can make.
[collapse=Sonic Change List]
-Sonic gets more horizontal momentum from grounded Jumps
-Sonic's aerial mobility is slightly lower
-Sonic's Jump startup is slightly faster
-C-Stick up while shielding now correctly jumps instead of Up Smashing
-Sonic's Forward Tilt is now one hit, has less endlag, and much more knockback growth
-Sonic's Up Tilt has a new animation
-Sonic's Down Tilt moves forward and back, and the hitboxes and animation were adjusted
-Sonic's Down Tilt sends foes up and behind him
-Sonic's Forward Smash hit duration extended and has a weak hit added during that time
-Sonic's Up Smash is two hits instead of many multi-hits, and the knockback on the last hit is stronger
-Sonic's Neutral Air is slightly faster, stronger, and has larger hitboxes
-Sonic's Forward Air has slightly faster startup with endlag and knockback adjusted
-Sonic's Back Air adjusted in knockback, and is stronger at lower %s
-Sonic's Up Air 2nd hit comes out slightly faster, sweetspot does a little more damage, and knockback slightly adjusted
-Sonic's Up Air autocancels much earlier and IASA is a bit earlier
-Sonic's Down Air initial hitbox spikes on both grounded and airborne opponents
-Sonic's Down Air no longer has disabled air mobility, and can be fastfalled to change the dive speed
-Sonic's Neutral B on-hit cancel is removed
-Sonic's Neutral B can be shortened by pressing Attack before he homes-in, this is called Blast Attack
-Sonic's Neutral B IASA is earlier
-Sonic's Neutral B hit animation is now reversible
-Sonic's Side B can no longer be jump canceled immediately, and the invincibility is completely gone
-Sonic's Side B initial hitbox sends outward, and halfway through aerial Side B it will send upwards
-Sonic's Side B can only be used once per recovery, he must land on the stage or grab the edge to regain Side B usage in the air
-Sonic's grounded Side B goes into a multi-hit somersault instead of a spindash
-Sonic's grounded Side B somersault is jump cancelable, and if you press Attack Sonic will perform a slide kick
-Sonic's grounded Side B somersault and slide kick are both edge cancelable
-Sonic's aerial Side B can grab ledges
-Sonic's Down B releases into spindash sooner
-Sonic's Down B can be B-reversed
-Sonic's Down B startup is faster[/collapse]