On battledroids, for the most part they'r grand in TPM, they sound just like emotionless robots, and are mostly functional, except for one or two instances. The first time they talk, with the roger roger crap, is usually muted, which makes perfect sense, why would they be talking loudly outside where two Jedi might stil be alive, shouldn't they try to creep in? Also the "Where are you taking them/does not compute" joke is corny, but seeing as it's pretty much the only battledroid joke in the whole film, it doesn't really stick out. Very little work needed on this film's droids.
Now AOTC, the droids aren't in a lot, but when they are, their voices have gotten a lot more annoying, and goofy. The super battledroids don't speak at all ,which was nice, it kept them intimadating. Again, very littl needed to do, but what does need to be done, really needs to be done.
But ROTS, god damn, what a horror to the senses. Every single droid in this is annoying, and childish. Every single one. Even the hulking super battle droids got those stupid high pitched voices, it's so juvenile. Worst of all, they feature the most out of all the prequels. This one needs as much redubbing as possible, preferrably similiar to the emotionless tones of the TPM droids, or at least something just as neutral and robotic.