What condition will you start from at the range? What condition will you stage it at in the house?
All the USPSA and IDPA competitors I have noticed with CZs are using standard DA/SA and lowering the hammer for a DA start. I have done so myself. The gunsmiths and parts swappers prefer the standard action.
The casual shooter might be better off with the standard decocker. The tinkerer could get happy with the Omega and flip flop back and forth until he settled on one system. Some might flip flop every weekend, which is not optimum.