Here is a far fetch'd theory I thought I would share with you all.
You know how bringing Death to Death (Sutekh) brings life and Sutekh scratched open the vortex, could have done some restoring? Well,
Surely that leaves open some opportunity to restore Gallifrey and the Time Lords? Because there is no reason why not to? I mean I'm sure they wouldnt do this right away, but it is a good option to retcon the Master single-handedly somehow destroying his home planet (another classic Chibbers decision)
Also, maybe there is some potential for some damage caused by the Flux to be reversed? This is even more far out but still works!