To me this doesn't look a very good guideline. It's needlessly verbose and unintuitive. Instead of writing a long sprawling list of things, just using bullet points and figures would be better.

It mentions the importance of getting a big picture of the code in question first, but the guideline itself is pretty bad at presenting its big picture.

Here's the gist of it as I understand:

- Long-term health of the code is important.

- Development should be incremental and steady.

- Beware of the contexts: style, use cases and technical complexity.

- Suggest them changes with reasons.

- Make it quick enough.