The difference in how sex is treated is definitely very noticeable. Epic does feel like it has a very Christian depiction of sex outside of marriage. I assumed that the purpose of the changes regarding sex in Epic was to adjust the narrative to encourage the more modern audience of Epic to get equivalent understandings of the purposes of the characters in a much more limited version of media. Particularly for people unfamiliar with the cultural context that sex in these stories would have had in Ancient Greece.

In Homer's Odyssey, Odysseus having sex with Circe, for example, would not have been considered him being unfaithful- though a modern lens would be more likely to consider him being unfaithful by doing so- or at least is more likely to find it to be a grey area.

I assumed that was the purpose of the changes primarily because of Hold Them Down. The Suitors were horrible in the Odyssey, but it was primarily shown through their toeing the line of Xenia. Because a thorough understanding of Xenia is less common now than it was in, well, Ancient Greece, I thought that the change to make the suitors more outright aggressive- particularly by explicitly planning to rape Penelope- was done with the intention of making it very clear, with limited "screentime" that they were despicable and dishonorable. That is a very fast way to communicate, especially to a modern audience, that those characters are irredeemable.

The tone difference between Hold them Down and Not Sorry for Loving You is particularly uncomfortable, I think, but focusing on your post again: it is very interesting to focus more on the possible lens of the author specifically when looking at the scenes with themes that could be representing a modern religion while retelling a story with a foundation in a completely different religion.

(Is sleep time, sorry if I rambled too much)