Welcome to the Strelets Forum. Please feel free to discuss any aspect of 1/72 scale plastic figures, not simply Strelets. If you have any questions about our products then we will answer them here.
I only mentioned ACW because Strelets said they would be doing some as I remember. Personally I am not a big fan of ACW for the reasons you mention, but I am happy for them to be done so long as other things are done also.
You can use Italeri Napoleonic French Horse Artillery for RHA with some conversion, except that the wheels of the guns have to be replaced by bigger ones, for example from the Revell Napoleonic British Foot Artillery.