The Witness is a AAA game, it just has a small team. What it lacks in assets and systems it makes up for in the depth and breadth of the puzzles (albeit based on a similar theme). Although for the Witness describing it as a puzzle game is a disservice to the overall experience.
I have done 90%+ of all the puzzles in the game, I'm just mopping up the remaining few, so I have a good understanding of what the Witness is.
You are paying for the quality of the game experience and the ability needed to create it, as opposed to a team of hundreds that created 500 different real world objects and sounds. That's not to say that the Witness fails in it's in-game assets or sounds because given the small team what they have created is nothing short of astonishing. Furthermore, the attention of detail in the asset production and placement in the world in creating some of the puzzles is on an entirely different level to any game seen before it. The ingenuity of the puzzles has a value. There isn't a AAA publisher that has created puzzles like this. Puzzles in AAA games are like tick tack toe to The Witness' chess. People are usually willing to pay more for something that is better than other things in the medium. You are paying £30 for an experience that I believe any AAA publisher is incapable of re-producing.
Reading this thread is depressing. So many will gladly pay huge multi-national conglomerates a good margin more for a game that is created to siphon even more out of the customer through DLC and in-game transactions. The Witness is a standalone game that nobody else would be able to make, or at least has not made yet.
£30 is not a lot for a one time experience that will make you learn things in a multitude of different systems, that opens your mind to new thought processes and teaches you the patience of learning things for a first time; when compared to games where you move the cursor to a polygonal based human body and click a button, despite their productions values.
The film Monsters was made on a budget of $500,000. When going to the movie theater you had to pay the same price as if you were going to see Battlefield Earth which had a budget of $73,000,000. Only in games is there a vocal number of man-children that complain about an asking price for something without taking in to account it's quality.
The thought process that indie developed games are worth less than big publisher games is archaic. If an indie developer can do more with less then they certainly deserve to have that ability rewarded.
Are the people opposed to £30 price point un-willing to pay for talent? It seems that they just do as much mental gymnastics as possible to ascertain that quality can not equal price point.
There's a reason why people buy Rolex watches when a £5 watch does the exact same thing.