It should be considerably shorter (we cut down on a lot of bloat), but ultimately depends on playing style.

Thank you.

It is up to the player. If you insist in defending every haven, destroying every Pandoran colony, then it's similar, but even then, there are less missions from DLCs for example and ancient ruins. In my current campaign in YT I am not pursuing colonies(mid to late game, three nest, one lair) not defending every haven and still the path is clear with one faction, pending just researches.

Whoa
A long war style mod that makes the game more enjoyable, but waste less time?
Bravo

Huh... a mod that makes the game shorter? That's different. Usually I play mods that add massively to campaign length, by adding a ton of new aliens and tech to research.

I LIKE the long game.