Well, I have played zillions (ok... maybe thousands ;-) of courses that look more open, but in reality are more restricted than Les Pins. One thing is how it looks and another how it plays. The soil is fantastic, as are the greens - I don't see much of a benefit from cutting down more trees. True, it would open up the course for more aggressive play, but it is a rather short track to begin with and many of the holes are side-by-side. As it is, they are hidden from view (with the exception of a small part on the back 9) and you are playing in splendid isolation. They did clear the undergrowth, so if you're in the trees, you may be able to recover.
I don't see, for example, why a generally open course like La Mer is preferable: where Les Pins asks me to hit a straight 7 iron or end up in the trees, La Mer wants a straight fairway wood or end up in hard rough.
Ulrich