Shit, don't even pretend. You know you will get Tyranny sooner or later.
Either way, I have been hearing that the game is definitely longer than that 20-25 hour rumor.
But regardless, the story is really good imo. Way more focused than Pillars. You actually know wtf is going on. There is motivation and companions actually integrate into the larger storyline. You make multiple choices that are major forks in the game giving it real replay value for people that are into that. I am about 15 hours in and am still reading all the text, so thats something.
Tactically, combat is only slightly improved from pillars. However, the open skill progression/class system makes characters way more customizable and skills/powers are way cooler with more impact and better animations. There is an emphasis on less skills that are overall stronger. imo, combat is a lot more fun.
imo, for people that like crpgs, this is a definite must play. Maybe wait for a sale, but its worth a playthrough.