I'm thinking if we could let every player put on a chip at the 'waist' in the badminton sense and have technology monitor their service instead of relying on the subjectivity of each service judge. Just thinking aloud.
I urge BWF to increase each player/pair's entitlement of linecall challenges to three per set for a start as part of incremental changes to see how it goes. Forget about altering the scoring system to 11x5 without deuces.
Problem could be the chip will move about in tandem with the players physical action, unless it is implanted into their skin.
Some naughty players may also adjust the "chip" higher at every opportunity.
Would you believe it, the Chinese has won G1 convincingly 21-13!
Zhang Nan is superb in XD and now MD, very heartening to see for Team CHN.