Although I agree the letters aren\'t of much use if they are representing the same thing that the graph is, I think if you changed their purpose and used them more as running style predictor, they could be quite helpful. This would be similar to the quirin point thing, something that tells you the runner\'s style in addition to what the speed it has is. Here are 2 examples to clarify.
If a certain horse is showing 4 lenghts behind on your graph and is behind a few others, but has a 8 in QP (which we\'ll call a \"A\" on your new scale), that means he is going to try for the lead no matter what even though he is most likely badly outclassed. This would make this horse an easy throwout because you can be assured he is going to try to do way too much running early on.
Similarly, a horse may show to be 2-3 lenghts off on the graph, but generally sits way back 6-8 off the pace and only has 1 or 2 QP (an E on the scale). This horse is probably going to be a lot further back than the graph suggests.
Yes we could probably determine all this stuff for ourselves separately, but if you were able to include it, it makes it a better product IMO.