It would be great if you could set a custom unbunching aggression for each stop on the line. Right now it looks like you can only turn it off (set it to zero) on a station-by-station basis. For example, on a high-traffic road I want unbunching lower to keep traffic flowing, but at a transit center or on a side street, I'd like to have more aggressive unbunching since it's less likely to cause traffic backups.