service fault, overruling linesmen and mop up
I think there are three things that BWF needs to change:
1. Service Fault
This has got to change. It is controversial and very subjective.
2. Overruling Linesmen
Hawkeye is too expensive for badminton. I hope TV replay is the best answer.
3. Mopping Up
Umpire has too much discretion. Why not permit each player one request (per game) for mop up and/or towel down!
the rules are ok. no need to change any of the above points...
#2 is worth considering but of course the number of challenges should be limited.
#1 is fine the way it is and #3 is nonsense. When there is fluid on the court it gets really slippery.