There's nothing wrong with bringing this up on wine-devel. Adam has taken the time to track down the possible bug culprit, and he's sharing it with the developers. If, on the other hand, he had just said, "app xyz doesn't work, don't know why" the the response would be correct. Not every developer reads wine-bugs, or checks the bugzilla.
Totally agreeing with you here. The mail from Adam Connell has much more to do with wine development then a load of other really off-topic mails that sometimes appear on wine-devel mailinglist.