I have no actual idea, but some guesses.
They might go to national training centres and the gyms with national team coaches and offer "incentives"?
Splitting nationals into different places for the different sports (MAG, WAG, Rhythmic, T and T) so that it isn't such a huge undertaking?
I know for the first time since I've been following gymnastics, Ontario with have 2 different Elite Canada qualifiers. I wonder if some of the issues are because it is a Canada Winter Games year?
So yeah no answers from just a mom like me, but thinking out loud, lol. I do know when I met with dds head coach last week that he found it odd that dates and locations hadn't been confirmed yet.
We will see I guess.
As an aside, is your dd going Novice this year? This is the plan for my dd at this point.