Of course, the move to secure order places may simply be a strategic move to trade those spots on the order book for more flying should one of the legacy airlines choose to order the MRJ for themselves. It’s interesting how the chess pieces move and fun to watch!
TLDR; Don’t expect to see this aircraft flying under the colors of any of the legacy airlines in the US until you see them ordered by the legacy airlines themselves.
Without the scope issue being solved these aircraft are dead in the water when it comes to the US. Obviously the US market isn’t the only market but it is certainly the largest and without it a manufacturer cannot expect to be a real threat to Boeing or Airbus.