Our current standards also create lots of ongoing confusion regarding pocket universe creation and destruction feats, with ongoing demands to consider them as more impressive than they are, due to spacetime being involved even if they are just the size of a city or less.
On the other hand, we do need to be able to distinguish destroying several universes from destroying a single universe, even if their entire timelines were not destroyed.
Essentially, we enter the problem with a tiering system with linear progression in terms of terminology, given that the progression from universe to timeline and universe to universes go in two different directions, and in addition we would need to distinguish destroying several timelines from destroying several universes in a more "standardised" manner.
One solution might be to involve the signs alpha and omega, or something similar, with the feats that involve simply destroying universes receiving either no extra sign or the alpha sign, whereas the ones that can destroy one or multiple timelines in a single strike receive an omega sign, but it would be much harder to compare characters in terms of powerscaling via this method, so it is likely a bad idea. Perhaps @DontTalkDT, @Ultima_Reality, @Sera_EX, or our bureaucrats and administrators can come up with better alternative ideas in this regard?