Now, I think judging the support for the Switch based off an overpriced port a game everyone's played 50 goddamn times already is incredibly stupid. But I think people are mis-interpreting what Capcom is saying here. I doubt they'd just drop support for the Switch completely when USFII bombs, rather they could just be using USFII to see what games work, and what games don't. If USFII fails, then that'll tell Capcom that Switch owners either don't want fighting games, or (hopefully) don't want overpriced ports. Their biggest cash-cow at this point, Monster Hunter is far too associated with Nintendo right now, so I don't think Capcom will just not bring it over to the Switch, same with Ace Attorney. One way or another, Capcom will support the Switch.
Still, I think they could've picked a much better game to test the waters. USFII is such a poor choice for first game, and the fact that it's $40 only adds further insult to injury.