I think it's a great concept and idea, and if SoE has been working on this for a long time then it should be a very stable idea. I have a lot of reasons why I'm going to join it and a lot of questions that I hope will be answered. I don't know if any of this has been asked or suggested... too many posts.
I started playing somewhere between Velious and Luclin (hadn't come out yet). I'm used to riding boats, swimming oceans, running through 3 zones, minimum, to get somewhere, and corpse running. None of these are big deals because, if you've played some other games (IE: FFXII) you learn to HATE large worlds. EQ zones are small in comparison. Going from one end of GFay to the other takes MAYBE a minute. That's not a lot of time, and if you think it is, I'm sorry, but your shouldn't be playing games in the first place.
These are the basics that made the game so interesting. I miss having to quest for my newbie armor. That gave me something to look forward to; to look at my cloth armor and go, "Wow, I can't wait to get those Bracers of the Initiates." PoP, while very useful, makes the game too fast and takes away the qualities that at least I really enjoy about the game. PoP and up (some would want to throw Luclin in here, but I wouldn't because you actually have to WAIT for the Nexus) really makes it feel more like a GAME and not something more, because that's the whole point isn't it? To make it feel like more of a fantasy? To be a character who has to work for something amazing? That's why it's called an MMORPG and not an MMOHack'n'Slash with quests. Anyone who's actually read EQ Lore can tell you that it's actually rather interesting.
I realize that the BACKSPACE map will be going away. But how will the patches work? Will all of the patches be up to date? IE: Will Bards now be able to Agro AoE Kite? How will they handle the character models? Will Progression be based on specific quests or Server-wide level percentage or a combination of both? I personally don't want Kunark and Velious to come out a month after the Server opens because one guild decided to go take down Nagafen and Voxx as quick as possible. Will Kerafyrm be a possible raid mob somewhere down the line (just a personal question of mine)? All of these questions and more will play a role in how The Combine will pan out.
I need to get to my next class. Updates later. Peace.