That seems extremely greedy to release paid DLC before the game is finished. No matter how much fun the game already is or work the game would be to make, that doesn't really excuse it for early access paid DLC in my opinion.
EDIT: also it shouldn't take 3 years more to work on a game that is already mostly developed. That's the problem with early access games.
EDIT: also it shouldn't take 3 years more to work on a game that is already mostly developed. That's the problem with early access games.
x5