The Compact L is very cool. I wished that they made more and that CZ would have just offered it straight up - like the P02. It has the advantages of light weight, a rail, and the safety.
The safety on the L is a straight CZ compact type and easier to use (to me) than the Omega. You also get the nice double bar action of the 75 series, and the ability to smooth and polish MUCH easier than a P01. The 75 series was not designed with a decocking action in mind, but it DID turn out as a reliable and accurate gun. The downside is that I've found the decocker guns to be less desirable in the DA trigger action, and harder to work on by far.
The L deletes that and allows you to get a better trigger. I think a downside is that it has no FPB - which is a consideration in carry.
UNLESS you REALLY need an optic, I would only upgrade the sights.