I really really really don't think that the bulk of the Switch install base cares about performance enough for it to have any meaningful or appreciable impact on sales. If that was the case, games such as SMTV, Pokemon Legends, and Xenoblade 3 would have done far worse than they did, and multiplatform games such as NEO TWEWY or stuff like the last few Atelier games wouldn't have sold more on Switch than other systems either.
This is all a moot point, the port is good. Yes, it is sub native, and I am sure a big deal will be made about that, but that's the whole thing, the people who are making a big deal will not be the people who buy games on or for Switch.