Re dual wield pistols
If it is intended i've noted that the second gun remains inactive in all situations (I was dual weilding a plasma pistol) for all four weapon ablities.
Option 1 - Complicated to implement but mouse left and mouse right = one pistol and the 1+2 keys = other pistol (even if its a different pistol type, allowing for combinations. The drawback here is that it might visually look strange to only use one pistol every now and again
Option 2 - Have the second weapon shoot with a reduced damage output like other MMO's,
Option 3 - Have the second weapon shoot simultaneously with the first for all abilities but reduce the accuracy, making it more effective at close range but worse at long range compared with a single pistol
(I feel like combining option 3 will give the best outcome here)