While playing with a Warden and using the grenade launcher mk.II I've realized that it says the listed damage range is 5-8 but it only ever does 5 damage at all times. I also have the skill Boosted Aim on this character and it never affects the accuracy of the grenade launcher. 

Is this intentional and if so would there be a way to state this in game? It'd be nice to know beforehand that launcher/grenade launcher weapons have fixed damage and also don't benefit from hit chance increasing abilities

Thanks for letting me know. I added both issues to my list for the next update. Will definitely look into it and think about the right change. 

Just to follow up, i am prepping a bug fix update today and took a look at this issue. When i have a grenade launcher and activate the Boost Aim skill (it is active and not passive) on a character I am seeing:

• the hit chance is increasing by 20% when Boost Aim is activated vs not active (i tested with direct aiming and area aiming)
• Having Boost Aim active did not increase expected (on the health dot preview) or actual damage
• Grenade launchers are not ever getting a critical hit

I'm looking into how i can fix the damage/critical portion but this is fairly complex code so i'm not sure if this will make it into the update or not.

EDIT: looks i found the problems and it's not too risky IMO to include this change so will have it in the update.