So they're trying to force a situation in which the cma has less time to do the required paperwork in the hope that they make procedural errors that can be more easily appealed?
Yes, that's my understanding. They did not say this verbatim of course, but their posture points to that.
What are the worst and best case scenarios for the ruling today in your opinion?
Best case? Regular timeline to be followed, which will mean deal is dead regardless of what the CMA has to provide.
Worst case? Judge orders that the CMA has to come up with their case within an expedited timeline (2 to 4 weeks) while complying with the exact same level of standards of a regular timeline.
Edit - I am not an expert nor a lawyer, so my understanding may be completely wrong. Take all I say with a grain of salt.