I can't say that I agree. I hated the whole idea of DLC when that first happened. Paying money for parts that are simply left out before release?!
I have never seen DLC worth it's price.
You know, add-ons and expansions, back in the day, they were 1/2, 2/3 or 3/4 of the price of the base game, but they added content equal to the price ratio. Paying €10 for what will likely be 1% of the game is not what I would call a fair deal.
No one who was a regular gamer before the DLC junk started would disagree. Paying more money for less content than what was established? No way.

From a business perspective, I think your idea might work out.
Unfortunately, contrary to above opinion, todays global playerbase prefers to overpay for their games. Not to mention they prefer to believe whatever lies publishers tell them, simply because it sounds promising or the marketing looks good. (Anyone remember Todd Howard? Morrowind was okay. Oblivion was crap. Skyrim is between MW and O. But barely anyone today would agree.)

[MOD] Reworked Madora and Jahan