I played TQ and it wasn't better than Diablo 2, and for all its flaws certainly not better than Diablo 3 either. TQ was a lot of almost-but-not-quite.
D3's biggest problem is the totally shitty item drop system, everything random, 1-to-max of any stat on ANYthing. No predictability whatsoever (other than gems, which are always exactly the same). TQ had many many big problems IMO, biggest one that the game wasn't very good... Difficulty was way out of wack, I got killed by the very first pack of mobs I ran into first time I played, not a very happy introduction to new players IMO.
Well I tried TQ IM really late on onlive. Many thinks may have been fixed since it launched.
I would say that the game is may be a bit tougher in normal difficulty. For example the minotaur was a pain in the @@@ for me and my build.
But the game is pretty rich, many classes and combinations. A side effect is you can messed up you build. I for one did by leveling mastery to fast... and that points can't be re-rolled.
With regard to Diablo3 I realize that my wizard build was sucking hard yesterday. I came with a completely different set of skills nd I've been able to resume my progression. Though my gears is getting really old (vs my actual lvl).
It kind of motivated me to push further.
For the other classes, normal is a bit too easy. With the gears I saved with my Wiz, the gems, they are in god mode for now, or real close.
Well I guess I'm too tough with the game. I'm slowly going through it, it has its frustrating moments but I still can go forward without using the auction house.
May be by the time I get my secondary characters to nightmare and my wiz to hell and further down the road many of the game lacking are gonna be fixed.
I may ended enjoying the game more than the horde then went through it in a few weeks.
Not using the auction house (for now) may not be a bad idea. It pushed me to level all the classes and I'm enjoying it.
As far as the community is concerned actually less players may not be that bad, as the AH is too busy now with plenty of problems.
Still there are lacking. I love the open world in Sacred2 after playing hundred of hours I still haven't discovered every places.
In other aRPG, less random one, you know what kind of enemies your gonna face in a given region, so you can adapt. Elite pack in D3 are imo insane. Yesterday I was peaced off because my wiz (before being reworked but it would not have changed much) face some champions that could not be beaten without ubber gear, "snakemen" with mortar and reflect damages, tough already... too bad they shoot mortar even when invisible... basically you runaway they disappear, when they reappear you run away... helpless/hopeless...
I will never have intensive to start the classes over again (especially as leveling I'm clearing my chest from items no longer useful).
Overall I believe that the game main issue is the horde of players that finished it in days, the hordes of farmers that twisted the AC economy, etc.
AC is even without real money make everything till Inferno too easy, and then in Inferno there are lot of complains. I believe the AC spoiled the game for many people.
Inferno is not for every body (pretty much like every highest difficulty setting in most games). It may prove too much for me (when/if I get there in a few months... lol ) but too many people got there too fast imho.
Well I've strong mixed feeling with the game, it got many things right, it can be really satisfying.
On the other side, the affixes systems is broken or close to be, the lag is bothering (I would never try to roll an hardcore character).
I also think that most levels are too tiny not enough to explore. Level should be bigger with an indicator for the main quest so you know where you are heading but you could ignore it and explore. There isn't much too explore. THe lack of secondary quests, significant ones, is one of the game main lacking to me, even more than un balance in Inferno.