The Business Lounge isn't under renovation yet. I was in there late last week and it's operating as normal. I believe they're currently working on the Krisflyer Gold Lounge.

I made the same connection from Hobart a couple of months ago. You'll have to wait until you get to Melbourne to receive the D sticker - they don't keep any at HBA. International check-in at MEL won't be open until three hours before QF9, but if you go to the domestic service desk at T1 they'll b...