I would be surprised if Ihaenacho doesn't start, assuming he's fit. I don't think that this is the sort of game where Pep will go with a false 9. I would expect Kelechi to get behind their centre backs a few times. It seems the ideal game to bring him back.
The first part of the Xmas schedule doesn't seem that bad. Sunday-Monday week-Saturday is a decent gap between games. Its the Burnley game which will be the one where fatigue sets in. It will be interesting to see if Pep plays more or less the same team for Hull and Liverpool and then makes a number of changes for the Burnley game. Or, perhaps brings in Nolito, Navas, Stones just for the Hull game. One thing is for certain, his selection for the Hull game will be influenced in part by his thinking on what sort of team he wants to select against Burnley.