Welcome all, and sorry for my english.
"Is it possible to release a separate patch for the game, correcting a few mistakes without having to download the whole game?"
The question focuses on the problems associated with pay-per-game, and games with a large "weight". I was searching this on forum, but I found only some old scraps of information. Nothing contained a concrete answer.
I hope that the question is understandable (because of my english of course).