I like my theory that the Gods of Destruction have a Base power, the power they used for example in the previous ToP. They also have their FP form, it is when they use the Hakai, that is when they use all their power. As it is forbidden for a God to kill another God, that is why in the previous ToP, they only used their maximum power from their Base form.
Then: Beerus (FP or Hakai)> \ >> Granola (Current)> Merus = UI Goku (Current) = UI Moro ~ Gogeta PSSJB (Arc Broly) >>> Vegeta SSJBE (FP or Hakai / Current)> = Moro (OG73I) ~ Vegetto SSJB (Arc Zamasu / Manga)> = Broly LSSJ >= Beerus Base = Remove it Base> = UI Goku (ToP)> = Jiren "Beyond the Limits" > Jiren (FP)> Vermoud Base >> Vegeta SSJBE (Post Yadart).
Surely Vegeta by mastering the Hakai, increase his power in all his forms and the same Goku by mastering the UI better and better.
Perhaps Whis is indeed 1.5x Beerus (FP).
Another interesting point is that the Dragon speaks of the Destroyer Gods as superior to any mortal. Beerus comments that Goku fights like a Destroyer God upon seeing UI Goku (Vs Moro). That means that UI Goku (Current) is on the level of an average Destroyer God, while Beerus is one of the most powerful.