Dear Nec Aliter,
Does the UGCC have an English liturgy?! I'm always the last to find out about these things . . .
The reason the "o" is small in the UGCC "orthodox" is because of the fear that if "O" is used, many Ukrainian Catholics will get the idea in their head that they are "Orthodox" after all and will start to read dangerous books - like those published by the Melkites, for example.
The next thing our people will want is to commemorate the Pope only ONCE (would you believe the nerve?) during the entire Divine Liturgy!
And then (May heaven forbid this!) they will push to recite the Creed without the Filioque . . . and then start to pay attention to the Epiclesis during the Liturgy.
Once this happens, the floodgates of Easternization will be open and next they will doubtless want to have all THREE antiphons in place with NO KNEELING on Sundays!
Pretty soon things will really go downhill with their desire to bring in Akathists and Molebens in place of the Stations and Eucharistic Adoration and Mercy Chaplets!
Make no doubt about it, those upstarts will want to tell their hierarchs they want LONGER services . . . and that they should start to grow beards . . .
Well, if THAT is what you want, then, by all means, use "Orthodox."
But just don't say you haven't been warned!
Alex