Forcing weapons to certain category is IMO bad mechanic. It would be nice (and much easier) to be able to place for example Scout rifle with void dmg as primary and Scout rifle with another dmg type as secondary. Instead of forcing us to have shotgun/sniper/fusion as secondary. Switching weapon midfight is very slow. I understand that by planning ahead and learning which enemy types you'll be facing and which dmg type is their weakness you can equip yourself for the fight. But still it would be nice to have the option to equip 2 primaries or 2 secondaries if you choose so. Small issue but would give more variations to the weapon load.