Musescore: A ton of pure joy; an ounce of frustration....

Greetings all: 
I am a recently retired IT professional in the Fortune 50 niche. I abandoned a music "career" decades ago, and chose technology to earn a living. I am intimately familiar with software engineering and coding techniques on a plethora of platforms.  So here I am, retired now , and returning to my first love: music and composing. And I have a burning question....Beyond the tons of posts concerning the search for very-high quality instrument Soundfonts compatible with MuseScore; beyond the legion of composers that  prefer staff notation and refuse to compose using a Piano Piano Roll (e.g. not interested in quantizing production techniques); beyond the CLEAR advantages of MuseScore vis-a-vis commercial competitors ( "cost", superior User Interface, Intuitive Navigation, bug resolution, efficient coding and documentation, the list goes on...), here is the question: I cite Overture 5 as an example.... Overture 5 has one extremely attractive feature that  would bring countless MuseScore lovers to Nirvana: the ability to Plug-in a superior commercial VST package. I downloaded the trial version of Overture 5 PRECISELY because it featured both a notation composing platform, and the ability to utilize - for example - Amadeus Symphonic Orchestra for exceptionally high quality string instrumentation. It  took merely 6 hours of intense use to recognize the inferiority of the interface ( followed by literally non-existent Customer Support ).I recognize there would clearly be some limitations to extreme nuances (bowing techniques beyond pizzicato, attack, velocity, etc.), but looking back at what our engineering teams accomplished in far more complex arenas, it's scientifically doable. At a minimum it would offer an enormously better playback listening experience, (and perhaps minimize the chance of those annoyingly void instrument artifacts dwelling in the drop-downs, the result of futile endeavors to improve that Viola).

So then, what's the roadblock? If it's "business-model" related, I can think of more than a few solutions to this outstanding exhibit of public domain software.

My congratulations to the developers who are carrying the MuseScore baton, and my sincere thanks in advance for your thoughtful reply.

Gary Andrews