Adding additional filter parameters, such as schedule_set_id, block_id, is_cancelled would be helpful when searching the master timetable for specific classes held during specific dates.
If you want class meetings you should look at the Schedules Meetings endpoint. It was recently added and returns all class meetings for specified date range.
If you want class meetings you should look at the Schedules Meetings endpoint. It was recently added and returns all class meetings for specified date range.
...and it would also be nice to be able to retrieve all levels in the master timetable instead of one at a time using these additional parameters.