I'd be fine with that. Seriously people act like we only to change one thing and let everything else stagnate sometimes.
Well, that's like bringing a B2 into a dogfight then asking the Su-35 for a fighting chance. Always bring a right weapon for the right job, I thought every Astartes knows that by heart.
Which are quite a lot if you take into consideration that most EC maps are pretty well defended and there are always Devs/Loota/Reapers running around, and those usually stand still.
I think the actual issue that people are talking about is the fact that defending is too easy at the moment. The walls, while they afford protection, are meant to be a dangerous place, as they make you a target. If you sit on the edge for too long, someone is going to pick you off if you aren't paying attention, whether it's a lascannon or not. I personally think defending is too easy at the moment.
I saw a movie like that. The bomber flew low and dropped a bomb, when it exploded the shrapnel hit the fighter and downed him. The lockon system is akin to telling the bomber crew "sorry I can't bomb there, there is no target" Its infuriating.
You camprasion is flawed to begin with Lascannon is not made to only destroy Vehicles, it's AA weapon. That you guys try to deny it's own capabilites.