I wouldn't mind a toggle. Honestly, it's rather badly implemented as is. I love the costumes at Geek Con, those are mostly right. The rest are just BAD. It wouldn't be so bad if they at least mostly matched or chose full-body outfits over separate pieces and didn't often attempt to put accessories in every single slot (sock with flip flops, can we PLEASE get rid of that?).
But, also, having a set of outfits like the styled outfits the sims can choose from for situation outfits would fix a lot of the weirdness. I just don't like the sims in my game looking like a color-blind clown dressed them (unless I mean them to be that way, which should be the exception rather than the rule :D ).