Most people would agree that the current state of Classic isn't working and things need to be done to change this situation. The leaked content you've seen in the last few days is neither finished, nor even guaranteed to be the future of Classic (it is one possibility from a number of potential options). I can assure you that if any such change is made, a full backup will be kept allowing the content to be reverted if things don't work out as planned.
DustyPorViva's comments that Classic may be outdated are entirely true, and that's the thinking/reasoning behind the new content. Theres no guarantee such a change will work, but it might be worth a try. The idea that we could simply convert the pre-NPC Server content and work off that isn't a realistic option. Classic was losing players before the switch to NPC Server was made, and even if that wasn't the case, such a conversion would likely take years to achieve, and reaching a perfect conversion is not possible due to security changes imposed by the NPC Server.
When I originally launched the NPC Server, I converted only a small region of old Classic, with the intention being to add new content with a Clasic feel outside this area. Unfortunately, ciscumstances meant that parts of it were rushed, and this has had a domino effect on development for some time. I also feel that some of the content added was not in the Classic style, and this has frustrated many players. My personal view is that this approach should be restarted (on a development server), but with the time taken to ensure that updates are done properly and keep the adventure feel that makes Classic so memorable. In some ways I would want to make the server hidden in order to achieve that, but that would ultimately damage the playercount beyond repair.
People have been very quick to criticise things when it comes to Classic, but very few people make suggestions of what should be done instead. All that I've ever tried to do is please the players, but it's clear that drastic changes are need. I've always been open to suggestions, and I don't ignore anyone who has constructive comments to make: I just wish that more people would give a useful input. At the end of the day, pure negativity isn't going to help improve things.
Things need to change/improve, and it needs to happen soon. All I ask is that you help me to help you.
