I've been to Saffire twice so I guess I'm one of those who sees value in what it offers.

A couple of observations:

1. All the rooms are gorgeous. All have very nice views (generally partial water views across to the national park IIRC with coastal bush land in the foreground) but it is worth asking for one that is off to the right as you walk towards the rooms from the main building. I found these rooms had slightly less foot traffic past them and somehow felt more private, although it's hardly an issue with such a small number of guests and no day visitors allowed.

2. There is really no particular need to upgrade room category unless you particularly want a bath with a view. The entry level rooms are lovely, and extremely large.

3. There is a small spa - book ahead. I thought the treatments were very good there.

4. I drove in from Hobart. The drive takes about 2-3 hours depending on your preferred driving speed. I find the air connections to Hobart more convenient than to Launceston, but I gather the driving time is more or less the same from either. I don't think the OP will be able to improve on the flight connections except by chartering. One option is to break the journey for a night or two in Melbourne because otherwise it would be a long day of travel once you factor in the drive as well. Alternatively Hobart is enjoying a bit of a renaissance these days so could be worth a night's stopover.

5. There is a variety of activities on offer. Everyone seems to enjoy the oyster shucking - you are taken out to the oyster beds in waders, so the oysters are literally straight out of the water. We enjoyed mountain biking along the beach and short hikes in the national park. If you are interested in conservation, one of the reserves that has been set up to try to save the Tasmanian Devil is nearby. Various boat trips are also usually on offer. But if that all sounds too active, there are other more sedentary options like cocktail mixing or just lounging around!