"So EXPO means exposed?"
"No. It means run out or bold."
Expo is the word used in Italian for bold or run-out, it's used for boulders as well as for routes.
The runout-ness is expressed by the S grade of the route, there are many routes of similar quality to Aria along this coast (from where we live you get to the start of Aria in a couple of hours) but easier and with closer bolting see
http://www.ukclimbing.com/articles/page.php?id=3061
I am pleased that James and Caroline's visit (they climbed Mezzogiorno di Fuoco at Punta Giradili as well) will make this section of the Sardinian coast better known to climbers. J+C popped round for a beer while they were here, and James as they were leaving said, "We'll leave you to your corner of paradise." In fact in Baunei they are offering discounts to climbers and other outdoor sports people, precisely because they want to promote outdoor tourism. See
http://www.ukclimbing.com/forums/t.php?t=502090&v=1#x6844583 The local councillors even came to help us clean the old charcoal burners' path which for the first time in history we rode down with our mountainbikes (well, 80% of it) as shown in
https://ukc2.com/t/197246.jpg
ciao Peter