I have a new Oracle. The design is much better now than the original design. Fisher and Paykel includes several sizes of nose plugs (plugs, not clips) with the new Oracle.
It really is a "love it or hate it" interface. Dries the mouth terribly unless you have the heated humidifier really cranked up - and is still rather drying then. The nose plugs are a must for me or air will snort out suddenly as a nose air leak! Just about guaranteed to wake one up

but at least easier to block off than the mouth air leaks traditional mask users have to grapple with.
I use my Oracle occasionally for those "Too congested - need to mouth breathe tonight!" occasions, but I usually just grab my full face mask instead, or end up switching to the FF mask halfway through the night. Too bad we don't have a designated demo Oracle that we could just pass around for the non-squeamish to try until it found a happy home... then stick another one into the lineup. LOL
Mask experiments sure do get expensive, but sometimes its the only way to find what works for us.