I agree with you completely regarding the Coppola treatment of Lucy, and think it's done to titillate male viewers, give us that strange beautiful scene in the garden, and contrast with his love of Mina, though I'm never convinced by that. It would take a lot for me to forgive a horrifying monster who SA'd my friend in her sleep and then tells me he has journeyed across time and space for me. Though I love the dialogue, my heart has always been steeled against this version of Vlad for precisely that reason.

One very interesting treatment of Lucy turns up in the Claes Bang version of Dracula, which was first shown on BBC 1 and then on Netflix, where I think it is still available. It's a spin on the Dracula story which is different and it has flaws but it has strengths too. In it Lucy is portrayed very differently, though even here there are issues.