Zamasu...

[Tsufuru]

why didnt he change body's with hit?
he saw goku and hit fight iirc, so wouldnt it be a better choice?

[Steven Bloodriver]

why didnt he change body's with hit?
he saw goku and hit fight iirc, so wouldnt it be a better choice?

Zamasu was more obsessed over to losing to Goku, so the Dark God King probably overlooked Hit.

[GodKaio-Ken]

why didnt he change body's with hit?
he saw goku and hit fight iirc, so wouldnt it be a better choice?

It took Hit a longer time to only be slightly better than Goku (if at all). So it makes sense to take the body with more potential even if Hit is slightly stronger.

[Xeztin]

I think it had a lot to do with the Saiyan zenkai boost, which Black brags about, even calling the Saiyan body a gift to Gods.

[Lionel]

Hit's self-developing chrono-acceleration technique seems like it would be just as worthwhile to have as Saiyan zenkais. He doesn't require transformations or God Ki to be so innately powerful. In fact, the circumstances of his livelihood appear similar to Freeza's who never had any incentive to try improving himself before Goku opposed him. His potential for growth may eclipse even the Saiyans.

Zamasu doesn't seize upon this opportunity because he has no information on who or what Hit is. Goku shared an influential and world-shattering meeting with him. Past experiences undoubtedly moulded Zamasu's intent to pursue Goku.

[fadeddreams5]

Hit isn't the main protagonist. Zamasu requires star power.

[Polyphase Avatron]

Hit was also a lot weaker in the manga adaptation.

[Draconic]

Goku was using the power of the gods, while Hit was just a strong guy. Not to mention Goku kicked Zamasu's ass hard while holding back, which made him obsessed with the guy.

[Alehandrew]

Think about it in real life terms. Hit is just a silent bad ass assassin, Zamasu is letting him do his thing. Goku is a bumbling idiot that has somehow made it to the point of acquiring god power. He's a walking insult to Zamasu.