Given that it is a request, I would assume that the list of contents should be taken as just that, requests. I think the formality of the text or the mere list format you presented (purely for the purpose of order) may have been interpreted as a demand, that's true.
As I mentioned, it is true that he has a certain preference for your character because of the factors I mentioned and you emphasised. However, we don't know to what extent he treats the rest of his clients and/or patrons. The game doesn't show if they also have a "special" treatment by the devil so the argument can easily fall apart if that were the case. OK yes, he treats Korilla well, if we want to rule out when he scorched her fingers, but beyond that we don't know anything about their relationship. That's why I urge an exploration of the relationship with the dwarves. As for Hope's line of dialogue.... We have to take it with a grain of salt, as her madness can play tricks on her (and consequently misinterpret). But of course, being crazy doesn't make or break a reason. It is a matter of interpretation of course, but there is no veracity in turn.
The subject of their relationship is shrouded in mystery and is rather confusing since its development began on the foundations of a version of Raphael that was later discarded to a less sexually aggressive one, but Larian decided for unknown reasons not to adapt it. So... Another thing to take with a grain of salt, it's cut content, and therefore no longer canon, important note. As for Haarlep... They themselves say they know Raphael as if they were Raphael himself, but they are a creature of demonic nature, so we don't know if their words harbour truth in them... What you say, free interpretation.
A kiss with Raphael can take away that essence that the players have loved about the character. The misterious aura and his unreachability to begin with... Something that can be hard to keep if Tav/Durge could step closer to him. As mentioned before on the forum: a good character, being well developed, doesn't need a "romance" (or something of a similar nature). I respect your point of view, but I don't share it unfortunately

As for his duality of nature, if we focus on the human side it is true that he can feel feelings that a devil purely speaking could not. However, there are thousands of emotions and they don't specifically have to involve love. Lust and passion are quite likely, but here his self-centred and selfish personality still clashes. Beyond himself it is difficult to discern Raphael being intimate...
On a final note, I don't deny that it's an attractive idea and worthy of exploration, free interpretation and one's imagination can work wonders and the concepts you share are great! But then again, the world would be a boring place if we all thought the same, wouldn't it?