I only like rpgm when there is a heavy emphasis on fightning and leveling, otherwise its always a waste, like you take any rpgm corruption game in modern setting without combat and wonder why the fuck it is rpgm, you just waste your time walking from map to map searching for events, it was nice in noxian nights because you could fight and the map wasnt that big, but i generally prefer renpy.
I feel like it would work in this game just fine, maybe it would even help it(combat system is build in so you dont have to waste time on developing it), i havent played in a while but if combat that you learn at the beggining does not matter later that kinda lame, would be cool if dom solved problems with combat and you could train further while sub solved stuff with sex(or sex "dyplomacy" to lift you troops spirits or somethin), dropping your systems that you worked hard on for months is a bad look and shows lack of vision.
I dont even understand what so complex about this plot, you had like 3 potential warchiefs or something, make it so you seduce one and align with them(like 1 dom 1 sub and 1 neutral or something), then you do some "unite clans/different races that do not like humans" or something plot and then you go to war and win/lose, make like a common ending to the main plot and then expand from the middle into different routes/add endings and post endings.
Claire's Quest has the same problem(basically abandoned main plot for side stuff long ago), but atleast scenes and writing quality is consistently good and you know it will never drop.