Agreed. I’m finding the same limitation. One solution would be that Cubase allowed us to reuse inputs and outputs when setting up external effects. That way we could define the same external effect as one stereo or two mono plugins at the same time. It would also be benefitial in cases of hardware synths that feature an audio input (e.g. Minitaur or Minibrute), as it would allow us to create both an external effect, for using the filter, and an external instrument, for the MIDI part. Unfortunately this is not possible right now, as we can not reuse inputs/outputs.