I have been livin' in Belarus for 12 years, and Belarus is a very christian country. Many people belive in God there, and go to chearch very often. And *everyone* is using this expression over there, it is ABSOLUTELY normal. We say that it is very bad to say "Ohhh hell!", because that's like you ask the help from hell. If you say "ohh my God!", it looks like you ask help from God, and people even say it all the time especially because they belive God will help them.
As about me -- i say "Ohh FUCK!!!!" or "ohh SHIT!!" all the time, so i dont give a fuck
And i like the new sound, and i agree that it MUST stay. If anybody does not like it --> dont use it.
That's it.