Just because it's an ARPG doesn't mean it has to be another Diablo or PoE. Fuck MP, fuck trading, fuck leagues. I'll take something like Grim Dawn over something like, say, Inquisitor Martyr which could have been a great game if not for all the shoehorned in MP/league/always-online bullshit. (And yes, I know Grim Dawn has MP, but it's so poorly implemented and pointless that it might as well not exist. Hopefully LE's turns out the same, though I wish they just never wasted the dev time on it at all when the core game still needs so much work.)
Play it until you're sick of the godawful grind it turns into at the endgame, make a different character and do it all again. Or don't and just go play something else.