Features description can be improved

It allows some speed related tweaks, but these lacks detailed description on what will happen, why and ideally any feedback what was speed before and what is speed after applying the tweak. I understand that in some cases it can not be measured.

I have also expected more details and more useful information about what is currently slowing down the page.

I have been lacking assurance about what tweaks has been applied and what are only suggested and waiting for applying using Save button.