Avirah: My assertion that shluchim say tznius isn’t so important is based on this thread and your statements that it’s not an ikkar…
Sorry, but I don’t know why you are dealing with the assertions of shluchim. We have already learnt from CS that there is no vetting of shluchim, and they can therefore basically be am haratzim (I know a few – albeit not many – of those) and menuvalim (I know more than a few of those – seriously). So why is it surprising that they say things that we may consider apikorsus?