So Skyworld is a haven for those who prefer the air (but ironically not Flaco). Who would'a thought.
FoD and Yoshi's Melee puts huge restrictions on mobility-reliant characters, and to a lesser extent large characters if at any time they're forced on the defense. T;is a huge advantage for any characters with range extending well beyond their character size (Marth and Ike) or those with intense offensive pressure capabilities (spacies, Meta). But both limitations aren't too hinderin' once you're on the offensive with the sole exception of Falcon loosin' space for better combos.
Point bein', said advantages are very notable in certain match-ups but can still be played around. On Skyworld, characters with good recovery have an extra platform t' aim for, sure. It's another option the edgeguarder is forced to cover, which makes off-stage edge guardin' all the more rewarding: you can prevent 'em from ever abusin' that option with a good ol' FF aerial. One can always cautiously ledge camp 'til the opponent makes a move anyways, then give 'em a nasty aerial if they try t' land on the outer platform.
That, and characters like Bowser with ridiculously good on-stage edge guarding don't give too many ****s 'bout Skyworld's outer platforms. He'll B-air or F-air ya either way.