Can you explain how you would draw the intersection area? One advantage of =crossing and junction= as I see it is you can split the intersection area to pure =crossing , and pure =junction . If you draw a area:highway=footway + footway=crossing , you rely on the implication it is a roadway area, which area:highway=footway itself is not. Otherwise, others may be tempted to draw the area:highway=residential (for example) across it, as an overlapping area. Besides, the area is a roadway area foremost, being crossed by the crosswalk. So it doesn’t belong to either.
The problem with junction=yes is it’s unnecessarily interpreted as a “named” junction on points. By extension, this would apply to areas.
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