Why can't EA come up with a consistent policy on increasing the item limit?

They had been adding 100 per expansion, then added 700 way back in what, February? Since that time, there have been no increases in the limit even though a massive amount of land opened up. The real purpose of the game is supposed to be town building, not just dumping new buildings into a green field in a random pattern. I would really like to have some guidelines as to how and when the limit will get increased because I keep hitting it. I had been storing in group storage a big Christmas display each time a new expansion came out, but now even with that in storage I hit the limit. It's frustrating.