Interesting that you should bring this up now. We just met this last weekend to discuss with JT's Top Shop about getting the cockpit enclosure made, and in the discussion we were discussing the dodger height. On Dolphina the forward section is a bit lower, but not by that much (see photo). So there isn't a huge "dead spot", but we find that when you roll up the centre section, the roll could have been supported higher up. Our's seems to droop too low for our liking.
As for the height, I found that it is as high as we can take it, because once we vang the boom, it can almost touch the dodger. Raising the dodger would prevent us from getting an optimal sail shape in certain conditions. So while we might like it to be a bit higher, I don't thinks it worth reconfiguring the boom and mainsail for it.