IMHO, it'd be much better to have an explicitly adversarial and separately-funded dual-track system at such agencies, similar to how the justice system works.
E.g. FAA-Innovation (responsible only for their goal) makes their strongest case and presents research on why unleaded gas should be adopted ASAP. FAA-Safety (responsible only for their goal) makes their strongest case on why no change should be made.
All arguments and facts are published in public. Then higher-level decision makers arbitrate and make a call.
The root of all evil is that from a career perspective, "defer and take no action" is always safer for individuals in positions of regulatory authority. Worst case, something that's always been wrong explodes, and you blame it on the last person.
In the current blended safety+innovation system, it's too easy to obfuscate intentional inaction in endless "more study is needed" bullshit.