Agreed!
And I agree with your agreement. Maybe the biggest barrier to entry for new DC fans is this sense that everything in the DCU is protean and changeable with each major event. Why bother getting into a story if the consequences will just be retconned away. A timeline of accepted events could make things easier for those new readers, not to mention new creative teams.
I like your version much better! Hopefully DC does some editing along those lines before finishing their timeline. Superman and Batman should just be in the "modern age," without their timelines being pegged to actual historical events.