Weve booked several times with an OS agent until the last few years when our $ slumped and she couldn’t match our prices here. But when our $ was reasonable I found they gave great OBC, gave us great upgrades as the price fell, (from balcony to suites) and were very easy to deal with just by email. Yes we do pay more here, especially as we don’t automatically get the new prices, but have seen Aussie cruisers saying by ringing they are, so that’s a nice change. We managed to get 1K off a December Celebrity cruise by ringing our agent here, and we kept all our benefits like OBC etc.
Id try an OS agent and see if they can give you extra benefits.