Hello,
1) To speed up the loading of your site fonts you may upload Roboto font https://fonts.google.com/specimen/Roboto to XStore Dashboard -> Custom fonts and then select newly uploaded (locally hosted) Roboto font at Theme Options > Typography
2/ If you are not using Font Awesome icons (in the menu for example) you may just disable it Theme Options -> Speed optimization -> Font Awesome (we have disabled it for you).
Regards