So based on what you said, why would I just not message a coworker?: “Hey Dan thanks for pushing that bug fix so fast!” Personal acknowledgment and appreciation goes a long way. I’m not sure this score board really adds much more to that dynamic.
Another thing I’m thinking is...this is a “vitamin” idea, not a “pain killer” idea. Meaning it’s not solving a pain point so you have an uphill battle to convince folks to even spend billable engineering hours to try it out.
Sales advice: Seek to understand, respond less. Try to ask calibrated questions to learn why someone came to their conclusion/objection, over responding directly to it. This is where you learn the stuff that helps you iterate. I know it’s hard, it probably feels like you have to “defend” because it’s an “attack on you”— but it’s not.
Actually.. this same advice applies to people leadership too.
Also...it helps to thank people for their feedback. They took time out of their lives to help. :-)