Qaddafi had backed off WMD and terrorism after Reagan counter attacked and then after the Iraq War, which he admitted was why he opened up to the West and gave up his WMD programs. So far he is winning this war, and if he does remain in power, it’s highly doubtful he would continue that policy - especially if he then knows he was able to survive a direct attack by the West - no longer any incentive to fear he would meet Saddam’s fate. And supposing that doesn’t happen and he is ousted - will a Taliban style regime take his place instead? This has the makings of being a complete disaster.
IMHO, if the British and the French wanted Colonel Daffy out so badly, they should had sent ground troops to seize Tripoli while the rebels still had momentum. Now if it looks like the regime will be able to remain in power, how is it going to benefit the West if Libya becomes a pariah state once again? Only this time with nothing to fear since it would had survived a direct attack from the West already.