Eh, I think ORS is good in spite of the dual protagonist system, not because of it.
I think Eva has floundered around doing revisions and making character changes that it's pretty clear that the dual-protag system is a concept that is hard to develop for a single writer at the scale that she's working with.
Besides, I think there is plenty of content and themes to explore with female main characters that are interesting. Eva doesn't want to be "the one" to explore all of them, that's fair enough.
I have no wish to see Ian removed, not while the game is being made anyway. Even if I had such a wish, I don't see the point when the game's already as far along as it is in development. I'd have still preferred the game be without him if it was only just coming out now, but that's neither here nor there.