Myself, if someone suggest I should change something about a song I'd quite likely find myself bridling at the suggestion.But if they took a song I'd written and sang it a bit differently, I'd probably be quite happy, because I'd be pleased they were singing my song. And I might take over some of the changes. But I suspect for a lot of people it'd be the other way round.
"Bridling at the suggestions" needn't mean I might not take them on board later. And it's different if you've laid a song out asking for comments. Moreover putting a song up on the Mudcat counts as laying it open to comments, in my view.