Fiona definitely leans towards being portrayed as a top, I just wouldn't say her dynamics with Ashe are a certainty that she will be an exclusive top. I see no reason so far why some ocasional switching couldn't happen, but I guess it still remains to be seen if that will pan out since there have been no scenes so far where Fiona was focused on servicing Ashe's cock (no indication she is in anyway grossed out by it, but she hasn't really given it any personal attention yet). But I stand that it is still too early in the story to take anything conclusive from that.
I feel the two main hooks of the early game are the incest relationships and the relationship with Fiona. The first are more geared for a "siren" playthrough while the latter is more geared for a "kitten" playthrough, but not in a mutually exclusive way imo and I like both, so I'd really hate to see the game make it impossible to enjoy both dynamics and also worsen the content for both routes because of route-split BS.
I feel the two main hooks of the early game are the incest relationships and the relationship with Fiona. The first are more geared for a "siren" playthrough while the latter is more geared for a "kitten" playthrough, but not in a mutually exclusive way imo and I like both, so I'd really hate to see the game make it impossible to enjoy both dynamics and also worsen the content for both routes because of route-split BS.