Omen as a character is all about misdirection and confusion, as his blind removes sight and sound from people affected by it. I think adding some misdirection to his ult would be beneficial, but I’m not sure if it would be too strong.

When omen uses his ult, he is now able to decoy tp to two different places. More clearly, he is able to select two locations on the map where just an ult tp sound is made, and a third location where he actually tps to. This makes it much harder to hunt down an omen who ulted as he could be heard in multiple places.

Another concept that could be explored is that omen is able to fake some of teleports when ulting (so the cancel sound would play for one of the decoy teleports while he tps to the actual place) but I honestly think that would be pretty imbalanced.