You are so much insisting on scaling up costs that you don´t see my point.
- technically its difficult. Se Red51s post for that
- scaling costs would make it more realistic but i see no point in doing that as there are other way to implement some realism into the game and give a challenge (see my suggestions for tools, processing, etc)
- compare the effort (for development and ingame-grind) with the cases in which you have more realism. Your example with the roofing was a very good example. Though a rare one. In which cases do you have a real benefit from enlarging a block for the cost of 1 stone vs. enlarging a block for the cost of i.e. 10 stone?
I really don´t see where higher costs will add to the gaming experience. For individual cases i am sure there will be a possibility (like with the PnB plugin currently for Java version) to generally raise the costs for producing a block. But scaling up with size is too far off (in my opinion) from a gaming experience. After all we want to enjoy a game, not build a real house.
- In the end we can request and wish everything we want. But the final decision is with the development team and technical possibilities. Nothing wrong from your side to want something. But don´t be too much focused on it. Its a game, not Reallife