Why would the Angels be interfering in something like this? Even if this was the case, whatever changes occurred would be happening at the Mortal and Demi-God levels at most.
They clearly knew this as well, otherwise they wouldn't be trying to play politics and decide who progressed to Demi-Godhood and who didn't.
Sylas hadn't known that he was playing into their hands when he stiffed the Purvon out of their promotion. But it was also quite clear that he had almost helped the Angels too much with his actions.
They had been planning all of this over the course of millennia, and if Salivar was supposed to be their true spearhead… well, the man had only just entered the E-tier. Even if you factored in his talent, it would take until he reached the B-tier at least before he was truly worthy of heading this sort of operation.
That was to say that the Angels certainly expected this would take a lot longer.
