Okay, so I went ahead and labbed the situation a bit more (against Grave) so that I wasn't just going by memory and end up just completely wrong. This is what I found after a C throw:
In order for Rook to be able to meaty a normal throw so that an immediate jump is not possible to escape, he needs to walk forward for 14 frames after recovering from the C throw. It is technically correct that an fA is not meaty at this point, but it does hit one frame after the defending player recovers. So... pretty much meaty. Additionally, I was definitely incorrect about only 1 damage. It does 2 damage at this point. However, C is certainly not meaty at this point.
Fuzzy guarding the normal throw and fA at this point is not realistic. I think I was pretty successful at it because of lack of player skill (on the part of Rook) and not knowing the exact timing in which to fA or normal throw for maximum effect. So, after C throw the situation is better than what I originally thought it was for Rook.
The way I view it now is you have a pretty much true 50/50 between fA and normal throw. So, to fuzzy guard, you would either fuzzy against one of them (fA or normal throw) and then jump out. I think that this situation is still fine. It's not close to as powerful as the options he has after normal throw. Like I said, I'm perfectly fine with a 50/50. But, I consider this to be a 'true' 50/50 because I don't think it's realistic to consistently fuzzy guard with a 1 frame window.
Considering the other options he has with not walking forward, he still has a pretty strong oki after a C throw, but I personally don't think it's ridiculously overpowered. Possibly needs to be tweaked? I personally doubt it right now since I haven't heard a lot of complaints from the higher level players.
I apologize. I did not mean to imply it was a back to neutral situation. I meant it as a "defending player now has more options at his disposal which changes the situation fundamentally." If the attacking player has to consider the fuzzy guard as a counter, then the defending player is in a stronger position than before. If the attacking player delays, the defending player can immediately jump negating all other options. I'm sorry, I think I may be misunderstanding what you're getting at. I feel like we may be talking past each other.
I'm confused by this statement. If you block the fA, you will block both hits of it even if you don't continue pressing block after blocking the first hit.
Edit: If you end up blocking the fA you get out of the situation. If you are able to jump out you get out of the situation. That's where I'm confused by the statement.