Concessions:
The only allowance FIFA have given is that the 2022 tournament will be slightly shorter than previous events.
There could also be scope to reduce the number of international friendlies in the calendar year as well as demands of a shorter predatory period to the tournament.
Objections:
European clubs seem to be objecting most to the proposed change as FIFA voted for the tournament explicitly as a summer event and as it’s the case that they have gone back on their re-mit, there should be a revote.