Haha, sorry for the inactivity here. I've had to take over writing story and based on what we have so far we will be following a different protagonist. Never realized how much side story a suikoden game really has, without getting into different character arcs the main plot is massive :/
Anywho, we are making slow forward progress, we are just trying to get this biggest beast out of the way right now: The Story. From there we will make final decisions on what exact we are going to use to make the game, RMXP is still looking like the best... But we have some other tools up our sleeves. I myself have been distracted and doing research trying to get all of the information to try to not step on peoples memories of specific characters or story aspects.