Well that... seems like an easy fix.
What's stopping 'em?
There's nothing stopping them, they're just choosing not to fix it.
It's the same problem with another bug in the game.
Currently AMCs with slavelinks have WAY slower projectiles than unslaved AMC cannons.
This isn't supposed to be happening but its a bug and i've been telling the devs about it for like a whole month now, and they told me they fixed it, but it still exists.
Same thing too with the default projectile speed. Comr4de has been telling Calbiri he needs to boost the projectile speed but cal simply wont listen to him.