I'm not having there being any decision to make about when Alisson is fit and who should play. Yes, Kelleher has done a fantastic job covering him and we haven't missed him at all, however there is a difference in levels between the 2. Alisson has the presence and positioning that sets him apart from any keeper I have ever seen and I have noticed an infrequent error Kelleher makes occasionally where he directs his saves back in front of him rather than to the side (Southampton penalty and Kovacic goal for Chelsea a couple seasons back). The only argument I could understand is phasing Alisson out if we are selling him, but Kelleher seems even more likely to leave at the end of the season.
Talking of presence, I also feel like Van Dijk has been back to his absolutely imperious best in the past few games, last seen pre-Pickford injury. He was so dominant it was fantastic to watch. One big glaring caveat to that, obviously. But if anything, that fuck up should keep him on his toes and guard him against complacency.