When adding a new virtual instrument via the Console ‘+’ button, and then attempting to add audio tracks to route to it in the Arranger, virtual instrument outputs do not appear as available inputs for the audio track. (This does however usually work as intended if you add the virtual instrument and the audio tracks to route to it via the Arrange page in the first instance). This is a problem when using multi-out VI's and attempting to scale the number of outputs at a later point depending on your changing needs.
Forgive me if this has be rectified since in S1 V5, I haven't been able to upgrade yet. Please disregard if that is the case.