While I very much like the Channel Overview, I do hope that it will become possible for third-party VSTs to have dedicated GUIs in that view, similar to the native ones. The controls included in the generic GUIs are arbitrary and, while they can be edited, there simply isn't room to get a representative set of controls on to that GUI as they are formatted just now. Yes, it's a simple task to open the full VST GUI, but for the Channel Overview to reach its potential, getting more controls accessible is key.
If you already know all this stuff, then perhaps it will be useful information for other folks.
If you double-click on the iconic representation of a VST effect plug-in in the Channel Overview, then it brings-up the original GUI, which is nice and sometimes is necessary for VST effects like Pro-C2, Pro-Q4, and Timeless 3 (FabFilter), which have elaborate GUI controls, where in particular Pro-C2 is easiest to fine-tune for "ducking" when you can see and work with the original GUI and its controls and parameters.
When the original GUI for one of the FabFilter VST effect plug-ins is displayed, in software engineering terminology Fender Studio Pro 8 is a "wrapper" or "container" and has all the required information to tell the VST effect plug-in what to do, hence what you suggest is possible and perhaps is not so difficult to do--provided the Channel View GUI space is sufficiently large to accommodate the original VST effect plug-in GUI.
By inspection, this is the way it works, which you can verify by double-clicking on the icon of the VST effect plug-in in the "Inserts" area, and the VST effect plug-in's GUI is shown. In macOS, as in Windows, everything is controlled by the operating system; but when you are using Fender Studio Pro 8, it is the application in control and whatever happens occurs under its "auspices" or whatever one decides to call it.
It's easy to get lost in GUI software engineering terminology, but colloquially I consider Fender Studio Pro 8 to be an application that "contains" or "wraps" all the stuff that runs in it directly or indirectly under its auspices.
For example, Kontakt (Native Instruments) is a VSTi virtual instrument with its own engine; but Fender Studio Pro 8 communicates with it; sends it MIDI; and receives generated audio, mostly behind the scenes, so to speak. There is a standalone version of Kontakt; but when it's running as a VSTI virtual instrument in Fender Studio Pro 8, it's being controlled at a high-level by Fender Studio Pro 8, even though most of the work Kontakt does is done in its own workspace, although it's a workspace given to it by Fender Studio Pro 8, which is close enough to be a useful way of explaining how it works.
This also is the way VST effect plug-ins work, architecturally.
Basically, when you anthropomorphize Fender Studio Pro 8, it says to the VST effect plug-in, "Here's some space, so use it to do stuff for me".
Yet, if you double-click on the iconic representation for a VST effect plug-in when in Channel Overview, the original GUI shows and then will hide if you double-click again; so it's a
practical way to do visual fine-tuning. The double-click needs to be in a specific area where nothing else is there, as shown in the annotated screen capture image showing how it works with Timeless 3 (FabFilter).