Ever since the derby cane was added I always felt like it was underwhelming and even that it felt like a direct downgrade, tho I've seen some people say that its better than the umbrella and even that it was overpowered. I don't know about all that, I've hardly seen any civ actually use it, and when they do it hardly does much.
I feel like instead of applying haste to a single team mate, it'd be useful if when activated it made an area of effect around the civ that granted a speed boost to all team mates inside, the area of effect would be smaller than the "morale" effect the civ passively gives encouraging people to huddle around the civ thus keeping him safe as they push.
and because I think it would be fun when its activated it plays the horse race trumpet fanfare