Multi-select is your new Collection field. It enables you to define multiple options in a single field, and brings you greater flexibility when you build Dynamic Pages.
The Date & Time field gives you another way of managing content in Collections and Dynamic Pages. Use it to display the time and/or date of classes, events and more.
Internal Collections can now hold more data than before (200 rows and 50 fields) so you can build more sites, and richer sites, with a single collection.