Although is probably implemented this way because once you make any changes, however small, the preset is no longer applicable, and rather than distinguish between a vegas preset and one that has been customised by a fraction, they simply blanket all with that description
also, some keyframes might use a preset while others don’t, so which do you describe in the box? Should it update depending on the keyframe one selects? Does AE (at which I am a relative noob) change the effect description based on keyframe selected? I don’t think so……
correct me if I’m wrong, of course.