Exactly, if a new player start a new game, one update without Adrianna wouldn't be a big deal as there is a ton of content with her already (and still a lot coming), but I can understand the disappointment of some. You can still check the reworked content of her though as it is "new"... haha...I don't mind the update. I like Adrianna the most too but If I was playing this from the start, it wouldn't really bother me that there are a few scenes in a row that she's not in. In the contest of the (someday) completed game it won't be a big deal at all. I'm just glad that the sharing part is optional, because I don't do that and it would have killed the game for me if it had been automatic.
Regarding sharing, I'll repeat it again but there won't be any NTR or sharing with main girls. Scarlett not being one, I thought it could fit her story, but well even for her it is optional.