JMC-MAN
You could be right.
Most of the aforesaid destinations are well-served by locos from throughout the UK, so Now would have a fight to win passengers over to them on these routes. However, unlike the destinations mooted on a previous thread (Lisbon, Bordeaux, Rotterdam, Valencia, etc), these already have known demand.
Perhaps the strategy has changed to applying their pricing formula to known 'trunk' routes, so they pick up late bookers put off by EZY and MON high last-minute fares. It's an angle, but a very risky one....