haha, yeah, guilty about being french... I completely forgot about the keyboard difference.
About the laser attacks, I put a slight delay between the targeting and the attack so the player so can be dodged by moving sideway, but if this caused you problems the delay is probably too short. Also yeah, the buildings are also meant to be used as cover. For the aiming system, there is one on the base attack, but it's probably set too small, and the heavy attack doesn't have one.
Thanks for your inputs. I'll try to fix it when I'll get back to the game...