I'm considering the same thing and switching to iCloud Drive as my family is heavily invested into the Apple ecosystem. The next versions of iOS and macOS will support shared folders, which was the one thing holding me back.

Also really annoyed about the price change. It seems to me like they know most people don't use the full 1 TB, or anywhere near it, so it's practically meaningless to extend to 2 TB. You really have to want to use all their collaboration tools to make paying $12/mo worth it. Otherwise they're just sucking up more margin.