Surely that therefore answers the question about 'decent places with ambience' in the main terminal being pretty much non-existant?
I don't go to airports for ambience. Apart from a very few select airports I can't say I know any with a place that you can go and sit and drink with decent ambience. Sure there may be some nice bars, with some great views of runways/ramp activity, but i'd not pay the $8 or so they want for a Crown Lager (for example) or the $8.50 for a pre-packaged sandwich.
Some airports are better than others, but compare SYD facilities with the SYD F lounge. Give me the F lounge any day over what the MAP terminal offers (at hugely inflated prices).
Lounges may not be 'the be all and end all' of airports, but they're more often than not a damn site better than what the rest of the terminal can have, even if it's just somewhere comfortable to sit that's not a gate lounge.
And a lot of us are a little mad here. If you enjoy it, and want to spend your money on it, why not just go for it? You only live once, and if it's fun, ignore the naysayers
It's your money, spend it as you wish!
All my 2c of course