While WW has some unwanted features (like periods) they can be turned off! The biggest problem with the new cancer part is you can't turn it off.
If someone had real family members dealing with cancer, watching a sim during chemo (or dying from cancer) would be a little bit ... unsettling.
Just make the feature optional (which means you can turn it off in settings) and it's good.
This is why I don't really like Nisa's Wicked perversions. I only want the hooker part, not the egg-laying abominations or the rape slaves