There's absolutely no reason not to use caged balls is a BB (make sure to install them correctly- the bulk of the cage nestles into the cup (toward the outside of the bike). There's no loss of performance of any kind.
As for the sleeve. If the BB shell is closed, it serves little purpose, and can trap water between itself and the shell. OTOH sleeves came into common use when cutout BB shells came into vogue. For those they were absolutely necessary to keep crap out of the bearings.
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