I never understood the criteria for maps to become CS standards anyway. The higher the CS version got, the more questionable maps got included. Instead, many great custom maps will never make it into CS - and nobody knows why. Isn't de_scud_2k1 a lot better than de_storm or de_survivor?
And those modifications without changing map names ought to be forbidden anyway. It's ok to offer more alternatives, but why force people to upgrades nobody wants? >
Heck, they could even provide the upgrade without any new maps and offer a bunch of them to download according to each person's choice.
Aw, you know what? I think we're getting old...