We don't have block or A/B schedules yet, but we’re working on them soon! We definitely understand how important they are!
That said, a lot of teachers use a quick workaround to approximate an A/B schedule in Cc. They simply leave all their classes turend on in the "Adjust Class Schedule" screen and then on each week, they use the day menu to quickly turn any classes off that they don't teach on particular days.
It's not automatic, but it should take less than 2 minutes to do before you start planning each week: