I enjoyed my normal run through, but I got kinda tired of Long War. Not because it was as the title suggested, but because it was balanced far more aggressively without altering the core flip-a-pod-and-you're-in-trouble mechanic. With the massive squad sizes and without the behind the scenes simultaneous attack limits even "Light" missions could very quickly turn utterly insurmountable. I liked it at first--the infiltrations, the retreats, the new classes. But the more I played the less satisfied I was with the details especially compared to Long War 1.
But more than that, I think what I found the most frustrating about Long War 2 was the Advent Engineer with it's infinite 2-turn cooldown flashbangs.
I'm quite looking forward to playing something with more going on than the base game but that doesn't have all the things I've come to dislike about LW2.