There's always going to be a balance between creating high level tools like this with no dials and low level tools with finer control, and while this touts itself as being "more controllable", it's clearly not there. But, the same way Adobe has integrated outpainting and generative fill into Photoshop, it's only a matter of time before products like this are built into Ableton and VSTs - where a creator can highlight a bar or two and ask your AI to make the the snippet more ethereal, create a bridge between the verse and the sax solo, or help you with an outro.
That said, similar to generating basic copy for a marketing site, these tools will be great for generating cheap background music but not much else, but any musician, marketing agency, or film-maker worth their salt is going to need very specifically branded music for their needs, and they're likely willing to pay for a real licence to something audiences will recognize, using generative AI and tools to remix the content to their specific need.