The only big problem I'm seeing so far trying out .713 is my controller seems to be far too eager to let me get stuck in place if its pointed downwards more than a tiny bit, halting me in a spot. Upping all the deadzones seemed to help a bit, though its still making me get hit more than I'd like.
After having a bit of think about this I've come to the conclusion that a suggestion that Maaltan had in one of the other threads would be the best solution. Their idea was that your character would only become fixed in place while firing and holding a diagonal rather than simply holding a diagonal.
The main benefit of this is that it should really blow all these problems with getting intermittently stuck and being required to set up deadzones correctly right out of the water. Which might just prove a major positive when it comes time for this game to receive user reviews. Even as a player that hadn't experienced much problems in this area due to using a d-pad I did find that I was having to be a little more precise with my movements than might be comfortable while moving freely. It makes sense to require this precision while aiming, not so much when simply moving around.
If this were implemented the only negative I see is that it would make fixing at a point and firing off short burst followed by short burst slightly more complicated. Currently you only need to hold a diagonal and then fire at will to achieve this, with the proposed new system you would need to release fire and the diagonal simultaneously in order to prevent any further movement. However an extra small advantage would be that it would allow you to pre-aim while running and then simply press the fire button to shoot off a volley, currently you can't pre-aim without being forced to a stop.
In summary, I think that the immediate benefits to analog stick joypad users all around the world (and whatever type and state of controller they're using) outweighs what might be a small loss of control in those burst firing situations.