I just flew out of KL last night on a Malaysia Airlines flight (another 777), less than 24 hours after MH370.
I think they've tightened things up a little - forgot a couple of coins in my pocket at the first screening and set off the detector, got the full pat down. Then at the gate they were screening again immediately before boarding and doing it thoroughly. First time in this part of the world I've seen them making people take off watches & belts.
Seemed to be a few more uniformed guards around than usual, even a few between the gate screening and the airbridge which I don't recall seeing before.
Other than that everything seemed to be business as usual.