The reason I say that is the following: game has been out for a while and the DLCs have been deeply discounted. If you’re spending $5 on a bundle in which your only/main interest is Renowned Explorers, I’d get it with the DLCs from steam in the next sale/discount. Especially considering there is a bundle for game+DLCs on Steam which already has a considerable base discount – 38%.
@PeteMcc I really like the “More to Explore” DLC, it ads interaction between the characters and a few new locations.
The new locations add replayability value. Since you can choose which locations to visit in each playthrough, you need to build your end-game strategy from the beginning. So if you have more end-game options, you have more early-game freedom. The character interactions add a new layer of depth, as your explorers can trade stories and thoughts with each other and that affects their performance plus makes for some fun achievements.
I’ve been wanting the “Emperor’s Challenge” since it was announced, because the new locations look very cool. However, I don’t think it ads as much to the game as a whole as the “More to Explore”. More to Explore feels like a CIV DLC: should have been on the base game.
Hope this answers your questions!