If you think SoulCalibur has bombed now wait another 6 months for Bamco to announce and release the Switch version.
That would make sense if extra development work was done following the delay but as BloodshotX said the developer moved on to a different project altogether.
The Dark Souls port team can move to different works and still have people inside Virtuos working on stuff, maybe it was about the online features, we don't know, but I don't think we can judge if a game was finished because some areas happened to run fine at Pax.