HI Olga
thanks for the reply – that is super helpful.
I guess this answers a lot then in terms of reliance of 3rd party plugins e.g. Kirki – as you can see it is Autoloading a fair bit and swallows up a lot of the allotted advise 0.8MB limit on autoloaded data on WPEngine who are said to be one fo the best WP hosts. So if your required plugins affect that a lot then this answers why some people suffer poor performance?
I’m surprised the Child Theme is so large a size – as well as some of your other essential required DB table Rows – I wonder if this can be improved upon as at the moment I have removed lots from my site and turned off Autoload data where I can but the theme itself is swallowing up a lot of my autoloaded data 🙁