Again, if it's a real problem then crews need to submit official reports to the CAA; 'mentioning issues to friendly ATCOs' doesn't achieve what you want, because us 'friendly ATCOs' can't decide ATIS policy. We can ask questions about it, and pass on our own opinion, but when asked where the safety issue is, if there are no reports there, then we can't change anything.
Gonzo, quite agree! I did file a CHIRP report - apparently when MAN had the same issue many moons ago with ATIS being blocked by another station many crews filed CHIRPS report and eventually one of the freqs was changed.