I forget at times there's a
very small minority (0.001%) that don't want to fuck every girl in a harem game...
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Having an opt out on Nora is easy enough to do but it wouldn't change anything as far as Rachael partnering with Nora though. That's going to happen whether anyone likes it or not...
I'm glad there will be an opt-out added, that is a relief. I don't think your stat there is accurate though.

That's the great thing about harem games, they're a buffet, and most people don't sample
every dish at a buffet.
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I always leave out certain character tropes or specific characters based on their personality, or body type, etc.
I'm sure no one cares what my particular preferences are but we all have them so I'm unclear why people are surprised (and even insulted it seems in some cases) that there is protest about a forced LI so deep into the story. An extreme example but aren't (most of) you glad there was an opt out of watching Barb take it up the ass?
I think Rachael returning to help Nora out with the family business is a great plot development, I look forward to seeing her start to fulfill her potential.