1/2 of D0ku guns made are like a rich hot girl, beautiful and useless. Look at the Jackal, Canis, Dragon (Why make a fully automatic DMR), and Arbalest. Shouldn't quality have stats to make players want to use it?
I hate the dragoon; I would have loved a fully automatic DMR but with the low RoF and that fact that accuracy is worse (gun doesn't reset) than with the semi-auto modification you end up just paying to not use it's gimmick; that being said it's still a really good gun; 1 headshot 1 body shot to kill (just like the others) and with semi-auto modification it has basically perfect accuracy as well.
I also think the Arbalest is a really good gun if a little niche.
The SMG's are pretty bad though, especially the Canis seems like it was poorly designed for it's weapon class. (it could have been a good gimmick for an LMG with a big ammo pool, not for an smg)
Out of new weapons, some will be good, and some will be bad.
The Maw, Gladius and Obelisk are solid weapons, which balances things out somewhat.
The Kindred is straight-up evil (167DMG/667 RPM in the first 6 rounds of your burst, and you are supposed to burst fire in this game, not just hold left mouse).