Realistically the price level of the Plus 6 is not bad but it still lacks some sophistication that many buyers would expect for that sort of money.
I think that's the main dilemma for Morgan in some respects. You can get a better car for half the cash... The +8 fully spec'd was a £100k car and attractive to someone who MUST have one (me, for example). But to the average buyer who might be weighing up 3 or 4 marques, the Morgan would be easily knocked off the list.
I would imagine there should always be a £35k/£40k Morgan somewhere on their price list... if they only have £60k+ cars they could become too niche and not sophisticated enough to occupy that price point.