I am getting ready to bring the page live;
I wonder if you can provide suggestions to improve scores under the sections;
I will take care of the "Serve scaled images" via a plugin
Any new recommendations since you produced this content?
WP Smush Pro45 (WPMU DEV). Smush Pro is a cloud based image optimizing plugin, that works on a API based system, that allows you with a few clicks to send your images for optimizing and also includes loesless compression with it's Super Smush option.
Kraken.io42 Kraken is another cloud based image optimization service, the main difference being, they not only have a WordPress plugin you can use, but you can also optimize images directly on their website, rather than using the plugin.
Ewww Image Optimizer27 Ewww Image optimizer is another cloud based image optiomization plugin, that also allows you to optimize and compress images to decrease load times.