Coalition-SV is very interesting design and approach to a problem with increasing rate of fire. We all know that intensive fire rate make gun barrel hot, and this is not good, two guns in one turret permitts to increase rate of fire without increasing (at least to some point) gun barrel temperature.
It is definetly a simpler, probably also cheaper solution than US choice in XM2001 with liquid cooled barrel, on the other hand Coalition-SV is very big compared to XM2001 or other self-proppeled howitzers, well it seems that there are no perfect solutions.
Question to Russian users, Coalitions-SV will be based on modified 2S19 hull or new hull will be designed? Rumors were saying that it should be based on Object-195 but as far as we know new tank will not be produced in nearest future, instead a simpler and cheaper "Armata" should be fielded so it is possible that it's hull will be a base for new SPH?