With the first two, he couldn't avoid it if he still wanted to have a country to run, he only did it as a minimum to appease the west. I'll believe the last part when it happnes, promises like that are very easy to break.
I'm not sure about the Pan-Am bombers, that happened before the whole war controversy began, right? But yes, he is appeasing the West and I agree about doubts about his statements about improving human rights. However, I think isolating Libya has served its purpose and weren't these the main events that got Libya isolated in the first place?
To build on your point, should the West have pushed their luck and tried to get more concessions from Gaddafi, considering his erratic mentality?