https://www.youtube.com/w[...]e=youtu.be

It really feels like it is the rule-sets dictating where the innovation/re-discovery goes for any given grappling art.

Talking about which, I like the 3rd Coast Grappling Kumite ruleset :
- Win by submission or reaching 11 points
- if the match ends before either, it is a draw and goes to overtime
- Overtime is "sudden death / Gold Rule" : first to score or submit wins.
- Aggressive stalling calls / penalties from the refs.

It does a good job to encourage action and deter silly stalling with a 2 point advantage.