I flew from Brussels aiport, a couple of months ago, after the explosions. Back then security had more layers and part of it was setup outside. I went 3 hours in advance (relating to flight time) to be sure I would get the airplane. Everything was relatively fluid, but with huge queues and different routing schemes for passengers things take more time.
How is it currently? Do I still need to account for the same amount of time? Are there better/worse periods along the day?