Eh, it depends. Note that Embracer didn't buy Onoma specifically, they bought it as part of a package from Square-Enix. Its perfectly believable that they can be "studio friendly" and still find that one part of a package purchase wasn't actually worth saving. Rebranding is easy and can begin planning before you even own a company, and before you've gotten the chance to do a deep dive organizational survey to see what the company's structure and assets and problems are. Its just embarrassing if you do the rebrand only to have another division of your conglomerate finish their audit and go "Nothing this studio can do is even close to worth keeping them around. Disband them and reassign employees and IP elsewhere."
