The more info the better. And the sooner the better.
Perhaps the most useful is the number of track miles to run. We normally have the full approach in the FMS, and to suddenly loose up to 30 track miles, whilst always vey welcome, can leave you well above the new profile.
We've just re-started flying to a lot of destinations in Germany and invariably get massive shortcuts when it's quiet. No problems at all for older hands, but as we have quite a few of these pay 2 fly people going through at the moment, it's bound to put the trainers workload up.