I think what would be good for CT is not so much a change of the rules, but some more clarification.
For example, Evolve to T5I think many people lean towards a task system because they're not comfortable with coming up with CT throws consistently and fairly on their own. There's little information in all of CT directed at a Ref making good throws (though, there is some). I think a book that included a chapter with some good, practical advice directed at CT Ref's creating throws on the spot, and the various values of a skill level, would go a long way to helping people learn the CT method rather than changing the game with a task system.
There are other areas, too, that I think could use this type of treatment. SensorsEvolve to T5, for example, could use some explanation in CT.