[Suggestion] It is OK for New Updates to not work with saved games
If there's ever a choice between preserving ability to load old saves or not, I think the development team should tilt toward doing what's necessary to update the game to get good balance and game mechanics. Surely it would cause problems for some old saved games, but if the changes are fundamental enough, then I believe most users would much rather starting a new game with nice additions, than continuing an old mediocre save.
If people want to be able to finish their old saves, they could simply hold off on updating, and play the saves until they're done. When they are done, then they can update. By then there might be another one or two updates since the new version, and nobody looses out. This way everyone will have a choice, and the evolution of Elemental itself would not be held back due to legacy concerns.