If I have a color style called "blue bird" but I change it from blue to yellow along the timeline, I wish it wouldn't keyframe that. Because, then, which is the REAL blue bird style now? The blue one one on frame 0 or the yellow one on frame 1000? I know you can 'force' a style to change by checking one of the chekboxes, which is useful, I suppose, but then there should also be a way to prevent styles from changing so easily.
I make the mistake of changing a style somewhere after frame 0 I get subtle color keyfaming which is often really hard to detect until you see the complete exported scene (that's when you'll notice your character's shirt slowly turning from green to blue).
I may be daft but to me this is a booby-trap. I wish there were a way to lock styles so you can't muddle them up by mistake

EDIT: actually, I can't even see a keyframe of the change! I just see the whole bird character go from blue to yellow but my scrolling the timeline there are no keys in his sub-layers (body, wings, head, etc), where I'd expect them to be. I must be doing this really wrong wrong.