Yes, you are right. The current JSON Forms component is kind of a mix and therefore hard to use in some scenarios. However we definitely need a major version release to change it as otherwise a lot of consumer will break.
However, there is a way around this. Using JSON Forms middleware, you can use the JSONForms component in a completely controlled style, so I would recommend using that if you need full control. See here for the docs.
Additionally JsonForms is plural. Of course, there is a parallelism with the library name here. But single JsonForm seems to be better. After all, this component does not control more than one form. It can be taken into consideration in future versions.