I only recently found this so I didn't know about those problems with Eiko and her story. While I've already made it clear I like Avis the most if there were a number 2 for me it might just be Eiko because of how interestingly developed as a character she is. Like I want to learn more and it seems like she'll play an interesting role in the bigger story regardless of your choices regarding her (but probably even more so if you pick her so its an enticing option)