The best builds are "1 skill builds"

I don't think there are any more 1 skill builds than in D3, and D4. Your argument here doesn't really make sense. Why are you playing this genre if "1 skill builds" bother you?

Not finished

Yet it's already a much deeper game than D3 and D4. Says a lot, doesn't it? The skills in LE have entire skilltrees onto themselves. Literally orders of magnitude more in-depth than the shallow braindead skills in D3/D4. Multiplayer is in the works btw.

Lost Ark: No, not really.

That right there shows you don't know anything about the game. Lost Ark skills are way more interactive with each other than anything in D3/D4. In this game you cannot spam 1 skill like you can in other ARPGs.

You clearly have no clue what you're talking about. Why open your mouth to babble about things you've clueless of? Shut your mouth.