I am assuming English isn't your native language because this seemed really hard to understand what you are getting at.
Game publishers have been using DLC as a business model to get more money for less effort. Understandable the money needed to make a game it's a pretty big investment risk. Some game studios have done this also with skin packs or item packs.
Most DLC is made often at later stages of a game when the art team is not that busy. See COD map packs most of the assets are completed they are working on the first set of DLC about 4 months before release. It's a waste of money to be paying the art team when they are doing nothing.
As a result most of the game is finished at that period of time any content made for the DLC is not cut from the game. Some people buy DLC content is cut content that not true some titles have done that, Capcom had a couple games with the so called DLC being locked on the disc.
It's for this reason why map packs have become common , the overall pricing is too high for the effort needed to produce. It costs something like $150,000 to make a map pack but yet they charge 50% of the price of the disc. Cost to produce a AAA title is something like $1Million to 150Million.
Due to having a set of assets along with a working game engine, Devs could take a spin on a new IP without the costs of producing a major title. Or even a spin on a current IP without much money being spent on the project.
A good example is Far cry 3 blood dragon , it takes the assets from far cry 3 puts a new spin on it and at a low price point. It was a success the company said they would try something like that in the future. You get hours of content for $20 vs a $15 no effort map pack.
You can tell it took a little bit more effort due to being released much later compared to map pack DLCs.
My point was that DLC does not need to go away it can provide some great experiences.
Lazy no effort DLC used to give the art team something to do has to die. Or content pricing for these lazy DLC should be returned by a ton.
If people keep buying it why stop right ?
Problem is customers get sick of being taken for a fool, it's bad business practise that in the long term is going to die.
Customers have already proved they want to have their favourite titles but these mini risk based titles on top.
With the cost of making a game going up I expect more studios to do these mini AAA titles in the future I hope so because it a great concept.
Short version : We need to return to it being a expansion over a texture pack and maps should be cheaper.