The current plan is the same as the old plan, for Butch and Suni to ride Starliner back home for a safe landing in the desert. The 45 day limit was initially set due to lack of knowledge on how Starliner’s batteries would perform in space, due to their extended stay they have had ample time to test the batteries and they are currently testing and acting nominally thus allowing for the extended stay. Their stay has been extended for NASA and Boeing to do as much testing as possible on the trunk of Starliner, the part of Starliner that had all of the issues. The reason for the stay is that once Butch and Suni depart from the ISS in Starliner and head for home the trunk will separate from Starliner and burn up (hopefully) on reentry thus making any testing on the main culprit of all issues that Starliner had impossible. This is getting to a diatribe so I will end it here. If you have more questions just ask.

Good question.