I have to say, I'm a little surprised ADE/Sonys support SVGs at all, even if they are part of the ePub spec., when you consider how slow even mainstream browsers (I'm looking at your IE!) have been to support them.
But by all means keep ranting until they do. It's really a shame that rasterized images have become so acceptable even in situations when they're far from necessary or ideal.
At this rate, how long will we have to wait till vector graphics from MathML, etc., are supported?