Priests must not say 'good morning' to their congregation.
Which I have to admit I completely agree with. I always say 'Good morning' once I've begun the service with 'in the name of....', which establishes the context. It is, of course, possible to go too far in the other direction and render a service completely inhuman and mechanical.
Don't agree with the other change mentioned at the end of the article though - seems to leave the priest out of the shared invocation.