Subtle changes, bugs and feedback

Which is why I get frustrated with you, you appear not to comprehend the size and complexity of a decade old codebase used to power 20,000 web-sites, that I then customised with the addition of at least 20k to 30k of my lines of PHP, and another hundred HTML templates.

No need to get frustrated. I comprehend it well enough.
I've had similar issues with Community Server. I am only too aware how much you are going down the rabbit hole when you embark upon such a task.

Just pointing out where the biggest savings potentially are. I know it may not be possible to achieve them.

My offer of help is genuine, by the way.