As part of the update for performance and to improve privacy, please provide the ability to turn off Google fonts completely and use system fonts. System fonts are not the options currently available. Reference  There should be the ability to choose either the sans stack (default for most) and the serif stack. Possibly use the mono stack for code. 

Ideally, in the typography section, there should be an option for “Use only system fonts” that disables Google and the custom section, but the ability to add weights and other styling needs to remain.