(This discussion is assuming that Game Freak doesn't decide to reverse this decision which seems reasonable as there probably isn't enough development time left to do so and Pokemon can't be delayed)
The blowback from Game Freak removing the ability to import your old Pokemon who aren't in Galar has been intense. This has not been helped by the two factors of:
-The Pokemon Company is charging money for you to be able to store your Pokemon in Pokemon Home so there's a decent chance you're just paying them money for literally no reason if your favorite Pokemon isn't in Galar.
-Game Freak has defended the decision by claiming that these cuts were necessary considering the animation and graphical improvements. The issue here is that Pokemon Sword and Shield has terrible graphics.
(How are these birds even gliding over air currents, where is the air current... What bird has ever changed direction like this)
Now, online outrage over various things often doesn't impact sales at all (please do not post the MW2 boycott picture, everyone has already seen it), but online distaste can sometimes be reflective of real life distaste also (see the savaging Dark Phoenix got online for months before it was destroyed by critics and lost hundreds of millions of dollars). Do we think this will be a major deal to real life consumers or is this something almost no consumers will actually care about?