Today's update addresses that with some key changes and new features:
Anomaly content is less dominant by default while the monolith is active. You'll see more incidents from the base game and other expansions now.
You can customize how Anomaly-focused you want your playthrough to be. We added sliders to the game settings that let you choose how much you want Anomaly horror events to dominate the game. If you want it to be pure horror when the monolith is active, you can. If you want the horror to be a light sprinkle on top of the rest of your RimWorld, you can do that. You can alter these settings any time in the options menu by opening the storyteller settings (and this is possible on games started in previous versions).
You don't need to see every entity on every playthrough. We reduced the number of entities you must interact with before advancing the monolith. You still can wait to see every entity, but it's your choice now. This spreads the experience further over more playthroughs, if you choose.
We've updated the Anomaly scenario to start with three researchers and a ghoul (up from two). This gets you into the meat of the game quicker when using this scenario.