No need to switch! A Roman Catholic may attend the Divine Liturgy at any Eastern Catholic Church and fulfill their Sunday obligation. They may even join the parish! It's like the best of both worlds. Which Eastern Rite is it that you attended?
The Eastern Rite Mass I sometimes attend is at a Byzantine Catholic Church. Including the prayers (chants) prior to the formal Mass, it takes about two hours.
Our Archdiocese also “offers” a Latin Mass each Sunday, although the Archbishop clearly doesn’t want too many people to know about it. It is not advertised (I only learned of it from a friend who attends a relatively orthodox parish) and it is held in a small chapel located in a flop-house section of downtown where parking is almost impossible, even on a Sunday morning. I think that our pro-abortion, pro-homosexuality Archbishop simply wants to be able to report to Rome that he offers the Latin Mass.