And as J have shown, that is a flawed metric that only works when you're up against a single slab of armor. It's the difference between theory and practice. And in practice, my ReML will blow through the rear torso armor of that Rokurokubi in one hit. Your medium lasers? Won't.
It's a very relevant metric, considering that it
specifically states ReLasers are better against reflec. Meaning any counter-example using reflec is meaningless. It's already been addressed.
Now, the relevant factors are:
1) How much difference is there between standard and ReLasers against given armor types?
2) How common are said armor types?
Since I don't have the later TROs I can't say how common each type of armor is, but I figure assuming a nice even split should be more than fair to the ReLasers. And what does that give us?
Standard MLs beat RMLs by so much it ain't funny against half of the targets, comes out fairly equal against a quarter of the targets (better crit-seeking and internal damage against better penetration), and lose out by a pretty small margin against the last quarter of targets for the same reasons.
So, should I take a weapon that gives me a massive advantage against most enemies, or a weapon that gives me a small advantage against a very limited number of enemies? I think I'll take option #1...
As noted things change in space since you don't really risk the damage types reflec is vulnerable to (or do Arrow IV, arty cannons and so on do AE damage in AT2 combat?). This makes reflec a very good choice in space, which in turn makes ReLasers a good option. Especially since you can't critseek as in groundcombat any longer.