Thanks for letting the forum know how you feel about this change. I'm not with Samsung but have been involved in app development. It's hard to know which features to keep, update, and grow sometimes. I'd bet this specific feature was under utilized by the vast majority of folks using the Samsung Health app, and so development effort was moved elsewhere. Hopefully your feedback is heard and that feature or something returns.
I'd encourage you to leave this feedback for the app developer here on the app page (Android or iOS).
I know in reading about this issue that some folks really want the weight management widget back, but I did want to make sure you knew the tracking capabilities are still there. As the report here states, some management features are being removed, but tracking of weight, caffeine, and calorie intake, is not.
Have you seen a specific feature function you want back? Which one and how would you like to see that used?
I've tagged your post so it appear with other feedback, ideas, and requests. This will allow your post to be more easily found in the event that Samsung product groups are seeking outside feedback/requests/ideas regarding our products.