I think that the only negative effect would be that you would lose the option to idle with the spark fully retarded. Accessories are more of a personal choice. I can see that it would make it easier to start if the engine choked down on unlevel ground and you needed your right foot for the brake. If I made changes to the starting method, I would probably go with the Fulton upstart, It uses a rod that connects to the starter pedal-button in the floor and you lift up on a lever to start. Snyders sells a repro of this period correct accessory but it is sort of pricey. I remember Debs grand father telling how he made his own upstart, back in the day.