Unfortunately not -- it's more or less all or nothing when it comes to the expansion content (aside from things like AI Types, minor factions, etc, which are your option to turn on or off). If you're already good at the game I wouldn't say that the expansions without those things really make the game that much harder -- true, there are some new nasties in the form of guard posts that are expansion-only, but those are mostly in Light of the Spire. If the map types you want are in Zenith Remnant, then that's one that really has the least impact on difficulty.
