I think the belt/pouches on Cass' old outfit worked, at least originally, because of the sort of energy and style that Daimon Scott had going when he was drawing her.
To me, it was stylistically brilliant that this small bundle of awesome fighting prowess was clad entirely in black but at the same time had these huge yellow pouches that made her the most obvious target. Not that anything could hit her, of course. But I liked it when Scott drew it, others never seemed to have the right approach to it. The 1st Appearances figure they did of Cass seemed really quite weird, too.