I keep seeing new posts in this thread and I keep thinking about the problems.
The Omega system isn't new. No one has reported this issue on the P07's, P09's, CZ 75s with the Omega system. So, what is different about the P01's having problems and the other pistols?
The idea/design is for the ejector, held in the upwards position by a spring, to fit into a groove in the left side safety/decocker and hold it in place.
If that's not happening then the ejector isn't doing what the design meant it to do. Why?
Is the groove in the decocker to thin to all a properly made ejector to rise to the correct height?
Is the ejector too wide to fit into a properly grooved left side decocker?
Or is the spring that pushes the decocker upwards not doing it's job?
Something, in these P01's exhibiting the problem, isn't made right or fitting together right. The dimpling/peening of the left side safety shaft helps, but shouldn't be a permanent fix. One of the parts isn't made quite right, or isn't fitting together per the design.
Then again, what do I know, other than it's not a common problem on the Omega system pistols so it doesn't sound like a design problem.