I do not know if old content will be released this week, this month, or before year's end. I do know it was promised and, although I'm quite sure that scripting (like pimpin') ain't easy, it's fair to say that Warmane broke their promise. Sadly they've done that many times but, to be fair, they are not alone.
World of Warcraft has, for a long time, been about max level play. There are those that think that "the game doesn't begin until max level" and I have friends that simply does not understand how I can enjoy lower level play. As such, a vast majority of the people who play on Frostwolf level up to reach level 90 - and not for fun - so to cater to that majority Warmane focuses it's development there.
I love leveling new characters, creating twinks and exploring old content, but I do not want to enjoy that privilege at the expense of anyone else's fun. If Warmane must take time to ensure these releases do not break the game, so be it. If Warmane decides that these dungeons can never be released, then so be it. I ask only that they honor their words, keep their promises and tell us only the truth. That much, I think, we are entitled to.