How many times in a year do you expect to go into the "control center" to change config? And how bad is it to have an old UI stuck in the 90's [1]compared while most distros still expect you to edit config files like in the 70's/80's[2]? Besides I am pretty sure you can configure tumbleweed without even touching that control center.

I haven't tried tumbleweed, but I have tried Mint a few months ago and it didn't really striked me as having much more modern tool and I don't think I even used a configuration management tool.

[1] that many people would praise nowadays by the way. [2] which still works really well and is still a pretty good UX imho.