TL;DR
Change the laser turret damage research prerequisite from "Laser" to "Laser turrets".What ?
Currently, the research for laser turret speed upgrades have the research "Laser turrets" as a prerequisite, whereas laser turret damage upgrades have the reserach "Laser" as a prerequisite. I am suggesting that both should have the research "Laser turrets" as a prerequisite.Why ?
It is confusing for laser turret damage upgrades and laser turret speed upgrades to have different prerequisites.Also, it does not make sense that it is possible to research laser turret damage upgrades without laser turrets being invented at all.
One could argue that the research for laser turret damage upgrades also applies to combat robot laser robots, whereas the research for for laser turret speed upgrades does not. However, I do not consider this to be a sufficient argument, because this is only true from upgrade level 4 onwards.