Exactly. I am in the same boat. I set up the family with individual, personalized addresses and a series of calendars that can be shared between all of us or just my wife and I. It's convenient, but not $200+/yr convenient. For now, nothing changes but I guess it's time to start looking around for a cheaper alternative should Google decide to kill off the free tier altogether.
Oh yeah, I completely forgot that it was $50/year/person. It would have been nice to have an option for $50/year for an account equivalent to the free version that they're taking away.