"unless we're going to put boots on the ground, we can achieve nothing."
Acting to all intents and purposes as the coalitions air force, rightly or wrong, means that it's possible that we can achieve something. I also would not be at all surprised to find out that we've got special forces on the ground assisting the rebels and are passing reconnaissance information to them as well. The rebels potentially have a much better view of the conflict than Gadaffi does, well some of the "higher up" rebels anyway, and if they are able to share that information is actually a very good question.
"What's our mandate? To protect civilians?"
I was thinking about this the other day... It's arguable that the rebels are civilians, they're certainly not a uniformed government military force. And that places the mandate in a very interesting light...
We've taken away the input of the Libyan Air Force and what heavy armour Gadaffi has now can't be moved out in the open, and they're the two types of equipment that the rebels seem to lack. So we have levelled the playing field. Whether it's now level enough for the rebels to win is a fair question.