Haha you're trying to make a problem out of nothing. The only reason the stacking is so rampant right now is because it works so well. It wouldn't work NEARLY as well with only 20m CS and up. I used to beat clans with 2-3 lb and many sh, with a bunch of tanks and mids.
That was hard and required intense strategy and perfect teamwork. Any stacking that takes place should be easily beaten by strat
You have to remember: stacking means that while their top is bigger, your mid section is much stronger. Which means you can win with a good strat