Larian Studios Forums Divinity: Original Sin 2 Divinity - Original Sin 2 - General Any info on the expected playtime?

Played through the (awesome) alpha in around 10 hours doing pretty much everything. Other people online were saying that was around 1/3 to 1/4 of the game. Any clarification on this? Hoping it's not true since the game would be much, much shorter than the previous one which would be pretty disappointing ...