TLT isn't a guarenteed two damage, though. Against high-agility ships, especially if you're lacking dice mods, you'll be lucky to pull off one damage.
I think the reason it's such a painful upgrade is that the double shots effectively halves the value of defensive dice mods. Yeah, high agility is one of the TLT's weaknesses, but it's less of a weakness when you consider that it wears down evade tokens and focus tokens so quickly, while also denying that range 3 agility bonus.
It's not a guaranteed 2 damage a turn, but it's just a very reliable damage output.