Maps do NOT have to be works of art, but, as a minimum, I would expect to see:
Headings at the start of legs in nice large clear writing.
Elapsed times at significant visual fix points (these should be at approx fractions of the total route, i.e. about 1/3 or 1/2 depending on the leg length to facilitate proportional timing correction. But at roughly 15 min intervals).
Elapsed time at ends of legs.
Mean wind velocity arrow and worst case Safety Alt (MEF +1000) in the middle of the 'triangle'.
Max Drift next to the W/V arrow.
As for drift lines, perhaps one per leg from the start point. But NOT used for angular assessment! We INSIST on 'Standard Closing Angle' for track correction as the primary method, so off-track distance is used for correction. The angular value is read off and applied once back on track IF the error was down to incorrect met wind. But NOT if the cause was inaccurate flying, incorrect rudder trim, misaligned DI etc.
Looking at a student's map will highlight whether he/she has been taught particularly well or not; however, why did the supervising FI not check mrshoe's navigation planning beforehand?
As for fuel calcs - most light ac fuel gauges are horribly inaccurate. So all I would wish to see is (flight time + 1 hr) x burn rate loaded - although we always send them off with full fuel on Q X-Cs.