One thing that is clear is that the phrase of launching American astronauts on American rockets from American soil will be used. Multiple times. That's as sure as SpaceX livestream hosts using the formulation 'Historic' Launch Complex 39A ;)
Elon says, Hardware for first launch will be ready end of Feb, but lots of double checks have to happen before launch and schedules lined up for ISS. Expect launch to happen in 2Q.
Elon adds that they need to get the space craftback and check it over to make sure all is well and there is nothing to address.
Elon teases trying to catch the dragon on re-entry to remove some of the constraints a splash down imposes.
Worth remembering the Crew Dragon wouldn't need a major redesign to do a powered landing. That's one of the reasons why the escape system uses liquid fuel - it needs to be throttlable - instead of a simpler solid fuel design.
39B is going be used by NASA's Space Launch System. Boeing finally shipped a booster last week.