Changing to 2x x does has the oddity of being the only gun to do this I think? Most other weapons state rapid firing, or have multiple barrels etc. Tis just something that can immerse you less in the game? And they should be a bit worse than a russ formation, because they cost less for a start... Being WE is a boost for engagements, supression and survivability (remember hits are distributed up to DC, then you move onto the next tank, you don't apply hits after saves to the formation, so the tanks get damaged together and manoeuvre can further improve this), would you say this is worse/equal/better than the russ formation size and speed advantages?
A russ formation does 30cm 20 AP5+, 45cm 10 AT5+, 75cm 10AP4+/9AT4+&1AT2+
So that is given a mixed or LV target
75cm -2 - 2 hits, -1 - 3 4/6 hits, 0 - 5 2/6 hits, +1 - 6 5/6 hits
45cm -2 - 2 5/6 hits, -1 - 5 2/6 hits, 0 - 8 4/6 hits, +1 - 11 5/6 hits
30cm -2 - 4 3/6 hits, -1 - 8 4/6 hits, 0 - 15 2/6 hits +1 - 21 5/6 hits
A baneblade formation 30cm 9 AP4+, 3IC AP3+/AT4+, 45cm 6 AT5+, 3 AP5+/AT6+, 75cm 3 AP3+/AT3+
So that is given a mixed or LV target
75cm -2 - 1 hits, -1 - 1 3/6 hits, 0 - 2 hits, +1 - 2 3/6 hits
45cm -2 - 1 4.5/6 hits, -1 - 3 hits, 0 - 5 hits, +1 - 7 hits
30cm -2 - 4 4.5/6 hits, -1 - 8 hits, 0 - 11 3/6 hits +1 - 15 3/6 hits
Broadly a pristine baneblade formation has half the firepower at range, same close up when doubling and while a russ company could unload on sustain a baneblade formation can assault, then all the WE vs AV factors (suppression and kills can make a big difference).
Given the other factors and price difference firepower comparable?
(Course what we really need is to break the weapon/stats link in Epic then you can put whatever represents the unit properly down
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