This is, I think, the only variant of the FCS manned ground vehicle (FCS-MGV) at all likely to see large scale production.
The artillery Mafia in the Army have been clamoring for a replacement for the M109 Paladin for years, and the downsides of the FCS-MGV in a counter-insurgency scenario really do not apply to this vehicle, as a self propelled Howitzer should never be in a position where it would be in close contact with the populace.
That being said, it would have been far cheaper to buy something from our European allies.