Complex sentence: The Australian Barbarians side was nominated as the national second-tier team, essentially Australia A by another name, also played against in 2011 but the team has not played any international matches since then.
Split into simpler sentences: The Australian Barbarians side was nominated as the national second-tier team, as as such was essentially Australia A by another name. The team also played against in 2011 but has not played any international matches since then.