I am in the linux world 20+ years. Used SUSE for short amout of time back than and never really cared much about it, just glad it still exist.
This is the first time I am hearing openSUSE is not part od SUSE.
Having different name should be good for all. I think openSUSE people should have done it long time ago. But sounds like name is not the only problem.
And relying on marketing by someone you don't control is not good decision even if losing some mind share.