From where did you get the information about any improved profit?
My hunch is that they are very much more expensive to produce then the FB type and have been launched at a suitable price point to be competitive with the nearest alternative.
Only Peco know what the margin is. Going by their usual awareness of all details of how to run a business I would not be surprised if they are making a reduced profit per item on the initial batch. As they establish a reputation, which I am sure they will, going by most informed observations, increased sales will improve the margin, as will increased efficiency. That new pack does not come cheap. I have noticed that there seems to be a small problem in that the under sleeper wires are easily damaged.
Bernard