With the holed one docked to the ISS that no one is keen to de-orbit with and this flight having one crew less they are getting into some situation now.
I guess they could send Soyuz MS-11 without crew so the current ISS crew has a more reliable craft for their own return.
The hole in [the orbital module of] the docked Soyuz is on the part that is jettisoned before re-entry.
"The orbital module is a spherical portion of the Soyuz that allows more gear to go up with the spacecraft. Unlike the lower crew capsule, the orbital module does not survive re-entry into Earth's atmosphere."[0]
I guess they could send Soyuz MS-11 without crew so the current ISS crew has a more reliable craft for their own return.