I think that this type of criticism has a reason, but perhaps needs to be addressed with more commonsense.
DQ costs exactly like Talisman. Both are well known titles and require FFG to pay licenses to others (I think GW for both); if we look at the components, we can compare:
Talisman / Dungeonquest
18 miniatures + sheets / 6 miniatures + sheets
6 custom dice / 4 dice
6-folded gameboard / 4-folded gameboard
166 cards / 330 cards
36 cardboard Fate tokens / 99 various cardboard tokens
30 plastic Gold coins+ 120 plastic cones / 117 Dungeon Tiles
Some of these components are not easy to compare, but while Talisman has more Characters/dice and a better game board, Dungeonquest has a lot more cards, cardboard tokens and the high quality and varied Dungeon Tiles, which can be considered superior to Talisman plastic components.
I believe that the component value is pretty much the same. What DQ seems to lack is the variety of components. In Talisman almost every card is a unique piece, while in Dungeonquest cards are often "mechanical" and act as substitutes for a die roll. For example, instead of rolling a dice you draw a Door card to see if it opens, it stays shut or it triggers a trap. This is true for many DQ decks, but I think that drawing a card is funnier than just rolling a stupid die.
The design value in DQ seems lower than Talisman's, or what we usually find in FFG games like Arkham Horror, Descent, Twilight Imperium and the out of production WoW titles.
Fun while playing is of course a major factor; DQ is our favourite choice when we want to relax and have a laugh together. People who like the gameplay and the fun won't care very much about price, but if you objectively look at the variety, uniqueness and longevity of the components.
After saying this, I think that from the rule design perspective FFG did a good job. The combat system is entertaining and provides the game climactic moments. I like this change and appreciate the clarity and completeness of the rulebook. They did a better work than when they revised Black Industries Talisman 4th edition.
The game works fine as it is. I hope that with expansions FFG can provide a little more flare and variety to Dungeonquest. Perhaps it's time for a DQ expansion too!