[Crazy Jetty]

Technically, more accessories means more plastic, developement, and materials. They have to make molds, they have to sculpt accessories, just like they have to sculpt the figures. Plus, the prices keep going up because of the cost of plastic.
ADDING more plastic, by way of accessories is not going to do anything more than raise the price further.
It'll be more obvious with these, than with the line at retail. Because at retail, they can balance out a heavy figure (Heavy by being larger, or by having more accessories such as Deathstroke) by including a smaller figure like Carol Farris into the same wave.
Though, Mattel seems to use this more with the C&C figures (Including the biggest pieces with the smallest figure... Gorilla Grodd's torso with Harley Quinn) for example.

But point being, including more accessories is not going to be free. If anything, the additional plastic (Even if they reuse existing accessory molds, as opposed to making new ones) will make the figure *more* expensive.