While Timeful’s features may never make their way into Google Calendar, there are other apps which fill the gap. We call them auto-schedulers at www.ScheduleU.org and I just did a podcast to compare their best features, and help someone decide which one to use. https://www.podomatic.com/podcasts/fwconsulting/episodes/2018-12-13T11_21_52-08_00