i think this is a great idea!!
altough the suggestion with GP is also not badd as you already could save you some presets and toggle between them, but having all your purchased Neural DSP Plugins within one master plugin, and just be able swap out some components would be killer
i also would love to see bugfixes (high cpu usse) and updates (tuner missing, etc) on the already published plugins, and also a generec effect section (reverb delay) on every plugin but also this new master plugin could be the soluation that you already include this basic stuff (tuner, basic delay and reverb fx) in this. and perhaps it would be also easier for neural dsp to update and incorporate them, as its then bascially just one plugin with one engine.
i very much enjoy this in like Toontrack Superior Drummer 3, where i can load all the Superier SDX Extensions, the EZ Drummer Extensions that i own, into the same instance, and can either add or change different parts from the drumkit, without having initiate a new plugin instance.
perhaps when Neural DSP started out, with single plugins, and their continueing sucesss, this wasnt a thought back then, but now with there quite impressive line of amp sims, as well as the hardware unit, such a master-enviroment plugin would be a great next step forward