Very glad you're working on this! Here is my wish list as a code reviewer:

1. Allow me to step through the code execution paths that have been modified in the pull request, based on the tests that have been modified.

2. Allow me to see the data being handled in variables as I look through the code.

3. Allow me to see code coverage of each part of the code.

4. Show me the full file as I am navigating through the program execution so that I can feel the level of abstraction and notice nearby repetition or code that would benefit from being cleaned up.

Full article: https://dtrejo.com/code-reviews-sad