Feedback on Lean Feature Proposal Template

Issue to collect feedback on the lean feature proposal template per gitlab-org/gitlab!42617 (merged) and !66103 (merged)

To allow enough time over a couple release cycles, this issue will be open through 13.7. But we'll likely start improvements on the template before that based on your feedback.

Please review your experiences:

• 👍 What do you like about the updated feature proposal template?
• 👎 What did you not like about the updated feature proposal template?
• 📈 What can we further improve about feature proposal templates?

For each point you want to raise, please create a new discussion with the relevant emoji, so that others can weigh in with their perspectives, and so that we can easily discuss any follow-up action items in-line.