1) This assumes that you have a new map for each trip (or use crayons on laminated maps)
2) It also assumes that the wind will *never* change. As an average skills test takes 90 minutes, that means there is easy enough time for the wind to change direction.
1) most pilots in the UK use laminated (or print one off a computer program these days), so new ones no problem either way.
Personally I would not want to fly with a map that I could not at least draw my track on, and certainly teach putting on wind arrows and max drift.
2) Yes winds change, but not normally so much over the duration of a skills test (including the time to get off the ground) that it should be much of a problem, wind arrow is for guidance only anyway.