They are sadly not self-explanatory. While you can tell if they are good or bad for the most part, you don't really know how they interact. It is believed that there is some form of synergy between these types of stats between group members, and certain negative stat combinations can result in parties flat out refusing orders while Love works well with other positive emotions and can give you bonuses. There also seem to be some impact on what skills your characters actually end up using. But they never tell you which stats actually work together, and in the ended, this just made me frustrated, as I wanted to design good parties, but the game refused to give me the information I needed.
I understand what you mean, but you can still design effective parties without knowing exactly how those stats are interacting.
Also, there are probably guides for the game online that explore the special stats further. But even without knowing what they do, you can still build a good party and it's still fun to do so.
My thing is, on the first play-through - go wild, explore everything and do what you think is best. If you want a little help, use a guide. Remember, a lot of games in the past relied on expert guides to learn the best possible strategies and tactics. The Last Remnant is old-school in that way. It's still very fun without a guide, but if you want the best possible strategies, weapons and tactics, you'd better look up the information you need on the web.
It's deep & complex, but it actually does not let you explore the depth that is there, as it withholds so much information. And, at least up to the point where I got to, there really was no need to explore the depth, as the game seemed to be designed with people not knowing what things does in mind. So my strategy, that worked almost 100% of the time was: Send one party towards every enemy part, to prevent flanking. Your parties are stronger than the enemy parties, as long as there's no boss in that particular enemy party.
I'm not sure how far you got, but I've already spent a few hours alone just exploring the depth of the battle system and character mechanics; designing formations, swapping party members, equipping everyone, etc. There is plenty of depth to explore and I think it is necessary to do so to survive the tougher battles.
I can't tell you how many times I've been slaughtered so far. I have died a lot, and challenge is not a question in this game, at least to me. If you get into tougher encounters, you will die. Once you figure out the best way to handle the situation, you will win.
For example, I just came from the Darken Forest, which was a tough area for me. Linking 3 enemies together could mean game over if things don't go your way. In order to overcome this I had to effectively use some strategy in battle. It certainly wasn't mindless. Keeping good formations, effectively using your unions that you hand built, properly using buffs in the form of arts and potions; all these things are important to look after and could mean the difference between winning and losing.
The Last Remnant is a game that I really wish I would have liked, because there is a lot of depth to the system. Or well, there might be a lot of depth to the system, it's hard to tell. Had the game not been so afraid of letting the player know what's actually going on under the hood, I think it would have been a winner, but as it does not give such information, I just ended up being frustrated.