Hello,
I’m looking for a way to send a single midi part with one note per midi channel to multiple VSTi, and actually i don’t find a convenient way to do that, maybe i’m missing something…
But my thought is that the most easy way to do that, is to update 
the Rack functionality, with a way to create a folder, like a “sub rack”, with the ability to put multiple VSTi 2 inside it, say for example 3 instance of the same plugin, assign them to a different midi channel, and then create a midi track, and send this midi track data to the “sub rack folder” containing the 3 VST, and so the different midi channels are automatically routed to the corresponding VST.