Length is not a problem. The "character" of the stages is. Historically:
- zero height changes and close to zero surface changes
- large part of "corners" is made up from cones and similar with penalties for touching them
- often multiple rounds around the same set-up "track"
- little to no mid-speed corners, either it's chicanes/90/180 deg, or flat out corners that are integral to the race circuit
At least one day should be on stages.
Personally I doubt Ypres will be ran, for Monza the chance is higher.