Using Improvement Proposals Effectively
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You can add improvement proposals to your "Roadmap" folder. Most of the fields here aren't required, and the very-broken-down entry system may not be appropriate for simpler projects or proposals.
IPs are autonumbered, and list by which release lists the IP in its "related proposals" field.
There is a simple workflow for improvement proposals to manage where the IP is in its process.
You can assign local roles in the releases and proposal folders, if you want people to be able to submit proposals but not assign them to releases without your approval. This is also the reason you associate Improvement Proposals to a release from inside the release, and not the other way around.