One thing for me has been the ability to iterate over plans - with a better visual of them as well as ability to annotate feedback about the plan.

https://github.com/backnotprop/plannotator Plannotator does this really effectively and natively through hooks

Wow, I've been needing this! The one issue I’ve had with terminals is reviewing plans, and desiring the ability to provide feedback on specific plan sections in a more organized way.

Really nice ui based on the demo.