Very little is written in the MCP2211 datasheet regarding the oscillator input configurations. The microcontrollers I have been using lately allow you to use the self-powered, single output oscillators rather than the integrated amplifier feedback mechanism on-chip.
In general, can one do this sort of thing for all cases when working with an oscillator that is fully integrated with the load capacitances and amplifier/feedback loops?
i.e. rather than doing this:
Can we always do something similar to this?: