Which means it was a Larian decision. Not players asking for more fanservice.
Heck, Halsin being a complete sex pest was entirely Larian too. Yes, people asked for him to be a companion. But it was Larian who decided to rewrite him in such a crude way (Which was actually a disappointment to many who wanted him to be a companion)
Even more so we have a situation where Larian's recent "One Year Statistics" showed that Shadowheart, the least horny Act 1 companion, was the most popular choice for the camp party. Which, outside of any data to suggest otherwise, is likely to have been true in EA. Meaning that Larian's decision to add in more horny wasn't particularly targetted towards what players wanted.
The effects of EA is not limited to EA players giving verbal feedback.
Larian heavily relies on user statistics to make decisions which they would not have without EA and also, the existence of the EA in itself influences as Larian kept changing Act 1 to keep EA players entertained, which included early heavy romances which might not have existed if there wasn't a need to give EA players some action.