It sure is; I still listen to it often. I'm really looking forward to adding Civ6's tunes to my collection too.
But listening to them also takes me back into that world and its story and makes me sad that it never received a 2nd expansion. I only have a small glimmer of hope that maybe the last expansion was extended/postponed and will be announced early next year, to work around Civ6 and because the game really needs the additional fixing/polish. (I think the messy Civ5 release didn't receive its first expansion for two years as well.)
If XCOM2 is on the one-year schedule, we'll get its expansion roughly around February, I think. Then, BE's expansion pack can be released sometime in the summer. Then, Civ6's first expansion can be released during the fall. Firaxis goodness all year round!