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I'd like to see hear the co-driver calls come a little earlier than the earliest setting in the options.
On the VERY rare occasion I get a good rhythm going, the notes don't come soon enough and the co-driver will be calling out events as they happen. On top of that, a single turn can completely change the way a driver might want to handle a corner/line, for example those sneaky 'acute left/right's' hidden behind a crest or a rock wall on the inside of a fast 6. Having the notes come a little sooner would give the driver a chance to plan out their line well in advance.
I've also seen a few threads around about an editor for the pace notes. I think that is a good idea, although I don't know how difficult it would be to identify and change a specific note from an entire stage. If it's doable, I would make use of it here and there for sure.