Ok, I'm not a huge fan of having two separate defenses. I have several reasons:
1) Aesthetics-watch any JRPG or anime, and the characters block and dodge all the time. They don't only rely on one (or rather, if they do, that character is more of an oddity than the rest).
2) Reality-when you are taught to fight, you are not only taught to block or dodge. You are taught to defend yourself. I've not studied a lot of martial arts, but I have studied some, and this was always the case.
3) Mechanics-Block seems, in all cases, mathematically (far, far) worse than dodging. Your negatives are higher. Your weapon can be broken. The only benefits are that shields add more, you can use item quality bonuses and it relies on Dex. You even need a Ki ability to defend yourself from magic, while a dodge does it automatically.
So... that being the case, I see little reason to keep the two aspects separate. I'd like to roll them into a single 'Defense' ability. It would key off Agil and probably use the Dodge modifiers. Item bonuses would add in full (I think). This is, I think, basically how the Fan project for Anima Beyond Sci-Fi does it.
Has anyone tried a similar Houserule? Any issues with it? Did you notice any effect at all?
Please don't try to argue that I shouldn't do this, unless you have some first hand experience that indicates the game will break. If you like it the way it is, that's cool. Do a different thread about that.