To head off some of the "why are there fewer mechs" discussions. Here are some factors.
#1) The cost of cardboard/paper has gone up in the last 5 years, over 300%. This makes the box and inserts more expensive.
#2) Mini quality. The new ones are MASSIVELY more detailed than the previous box. They are also a bit larger, and the plastic (from discussions with TPTB) will be much harder than the previous box.
#3) Inflation. Everything gets more expensive, but the cost doesn't go up, so a reduction has to be made somewhere.
#4) The last boxes were a loss leader (no profit), even when they were produced, before the cost of materials went up substantially. This can't stand any longer.
I can say I have personally seen the new maps (drool-worthy) and the mechs (3D-printed final prototypes) and they are awesome. I'll gladly put down $80 for it all (20 for the beginner box and 60 for the core).