The ability of us to choose not to follow the Dylan path disproves your point. Especially since the Ellie route contains some of the hottest scenes, and the most nudity. (Boobs!!) That all the sex scenes so far have not involved Dylan disproves your point. That there are currently at least one, possibly three or more women besides Sophia Dylan can end up with disproves your point.
I'm not saying that Dylan isn't a character that people can and shouldn't enjoy, not even that Sophia/Dylan isn't a route that people can and shouldn't enjoy, only that at least for me, Dylan is a character with wasted potential that I hope can be remedied, so he gets more appeal than just the M/S fans he seems to have at the moment. I keep seeing potential for great storyline and character development, only for it not to be realised.
I'm on Team Ellie is because we're heading into the halfway point, so the storylines should be settling in, and she's the character that I think has the best balance between hot scenes and character development. She has one more event before we get there. Her character has been introduced, shown her flaws to make her interesting, and everything is setting up for her branches to start on playable day 16. We've seen her be shallow and manipulative, but also to realise that doing so has its limits, and that she can achieve great things like she has with Sophia and Julia. That's the type of character development I believe Dylan could still be capable of.