As has been pointed out, I think a big part of the stat-gaming tendency you get in the demo is the range of quests; there are only 4 or 5 options, at most, for you to take to earn more skill points/gold within the demo. If the demo's "FULL GAME IS" ad is correct about ~120 quests well, that's a lot more than I would have thought based on the demo-Teron, so good stuff.
Depends on how you count and what's a quest, but I'd say there are about 30 quests in Teron: 7 vignettes, 12 guild quests (3 x4), 2 Dellar's quests, 2 Daratan quests, Feng's quest, Flavius' quest, Cado's quest, Miltiades', refugees, the pickpockets, the cellar, plus minor stuff like the ring, the infiltration, etc.
I also don't know if the whole 'stuck in Teron then sent to Maadoran' deal is true in the full game, but I assume at the very least, after Teron, the world will open up.
Keep in mind that the world is mostly ruins. You need to know where you can go, but we'll give you 3-4 places to start with in the full game (like Aemolas' gold quest).