There is another theory going around for few months that there are two types of Ultra Instincts, defensive and attacking. While Goku is said to have only the defensive half. Also Goku still hasn't fully mastered ultra instinct completely so it is hard to predict full power of ultra instinct

according to this, zamasu wouldn't have been a bad guy as everyone on earth was already dead as they were killed by Cell so there was no need for Zamasu to become evil

next confusing thing that now arises is during these events it was said that all the angels were also gone with the god of destructions when Zamasu killed kais. But during current tournament of power, the angels still remain when their universes are wiped out.