As many disciplines as possible...
Freestyle is OK but just going big for a few technical tricks, IMO don't make you world champion if you can't compete in all the other disciplines to a similar standard.
But then it depends on the competition as organising and judging is very difficult.
But I do think there should be a list of compulsory basic tricks, which the rider selects a set number to include in each of their rounds.
How it could work
Rider chooses a set number of tricks from a list of compulsory tricks (based on number of rounds) and for each round they reach, select further tricks from the list which get progressively harder until they reach the final.
Kiter-X is good idea as would be a downwinder race
Also Sliders and Kickers.
So maybe each event location could choose 3 disciplines - all judged separately then at the end of the season all results are calculated together.
ending with Freestyle World Campion, Kiter-X, Wakestyle, Downwind
and Overall Kitesurf World Champion best season score from all disciplines
just a few ideas....