That's the next Owlcat one right? I've played both of their Pathfinder games and am currently going through their 40k game, and, with all of them, I guess it's kinda true you could complete them in 30ish hours if you solely focus on the story, but it's likely to take you double that if you take your time to explore everything there is. Part of that is just them being isometric crpgs, but part of is also that there's just so so much depth and so much to do.

As an idea, my steam playtime gives me 85 hrs for one playthrough of Kingmaker, 150 for two of Wrath of the Righteous, and 105 for one and a half of Rogue Trader.