They said you'd keep everything, all class levels and items/currency/progress, with the possible exception of in-progress quests. If the 7th Umbral Era's world changes ends up changing the landscape or world enough that some quests cannot happen story-wise, they would be cancelled or reset. So don't worry about your character getting deleted or otherwise rolled back in any way. They know that many people are going to be holding out until 2.0 and not holding onto their data at all would be shooting themselves in the foot in the worst way.