Anyone that's read my posts here knows that I have decidedly mixed feelings about EQ2. There are some aspects that I still marvel at, even though I've played computer games longer than most posters here have been alive. Then there are some aspects that I (still) think are needlessly overcomplicated and detract from an enjoyable gaming experience. So I guess you could say that I am firmly on the fence at this point.
If you come from EQ1 as I did, there is probably as much to unlearn as there is to learn. You aren't going to be able to lay the game in the same way that you were used to. You're not going to be able to go anywhere and assume that you can solo effectively and efficiently. You aren't going to be able to make huge sums of money quickly. You aren't going to be able to craft as a sideline unless you have skads of time to devote to the game- crafting is every bit as time consuming as adventuring, if not more so, and is certainly more tedious (the harvesting part is at least). You are going to have to learn what your class brings to a group and how to fit your capabilities into a group because, like it or not, grouping is the ONLY way to effectively and efficiently level (if there's an alternative, no one is telling).
Now, to address your specific questions:
>>>1) Is EQ2 worth the price of admission? (new computer equipment, subscription, etc.)<<<
If you want to experience the best of the genre, then yes, the game is definitely worth the price of admission. In my case, the price was about $1400US plus the subscription and I'm not exactly Bill Gates in terms of disposable income.
>>> 2) Are the beefed-up graphics taking away from the gameplay?<<<
At times, yes I think they are. Most dungeon-types zones are overcrowded right now simply because they offer the best hunting and best loot for their level range. So they can degenerate from silky-smooth fighting arenas to slide-show lagfests. On Najena, we had three Fallen Gates going and each had nearly 100 people in it.
On the good side, you can turn graphics options down pretty far and the game STILL looks great and plays at an acceptable framerate in all but the highest-population zones. SoE did a great job by giving the players a very wide range of graphical options to turn on or off to improve gameplay.
>>>3) How many EQ vets are actually enjoying the new world, and how many miss the old one? <<<
Maybe I'm among the lucky ones because I only came back to play EQ1 for a few months before packing up and moving to EQ2. I played EQ1 for almost two years roughly 4 years ago so there was a great deal of content of which I didn't have firsthand knowledge. As the saying goes, if you don't know about it, you can't miss it. All that said, I do prefer the EQ2 environment to the EQ1 one in just about all aspects you can name. It's a vastly superior game, even if it does have some flaws.