Lessening, I assume, would only happen if the Badlands were to be dealt with... or, better, the Lambda, as that is apparently the ultimate origin.

[Who says that just because they're big, they can't do some trick-flying? Jetfire lets his speed and altitude drop enough to get him level with Skyfire instead of flying above before he continues.]

Which might or might not be true, but there's some connection at least, since the Lambda has at least at the majority of... ah, incidents, showed some anomalous effect before each situation...