Not sure if this thread is dead or not after so long, but some friends and I just found this and would be very interested in playing around with it. I had just a couple questions.
For the Agility stat, how did you plan on having it affect the accuracy and evasion rates of physical and/or magic attacks? I looked through the guide and couldn't find anything about it.
Also, and this is more of a suggestion to consider, do you think that using d100s instead of d10s for attack rolls could be more beneficial? A lot of the skills in-game have an accuracy of 78 or 75 or some such, so using a d100 for an attack roll would allow for more precision. Sukunda and Sukukaja could work the same, the penalty/buff would just be by ten rather than one. It could also make however you choose to implement Agility in the attack roll more balanced, since as it stands, Agility could be an overpowered stat since it affects so many crucial things.
How did you plan on implementing social links without Persona fusion? Are you familiar with Persona Q and the sub-persona system used in that game? I thought that it might work if you assign a sub-persona to each rank of the social links, that way the players could gain access to better sub-personas through improving their social links.
I think everything looks good so far, those are the only questions that I have about it. I really like not having to roll dice for attack AND damage. Just having one die roll to resolve your turn really speeds up the process and leaves room for plenty of role play.