The base game is already pretty packed, at least it was for me last time I played and it was 10/10 experience as they say.
Why does the headline seems to say new paid DLC is a problem? Considering this is the second one and there has been a shitton of bugfixes and QoL patches (and will be as the article itself says).
"Klei Entertainment Is Working On New DLCs For Oxygen Not Included, Alongside QoL Fixes" FTFY pcgamesn