I enjoyed bg on euro but I can see a lot of reasons why it is difficult to add here.
a it was exploited on euro
b two new classes now would it be a group of 8?
c it was far too easy to get to the bosses
d some people never went anywhere else
If bg is to be added, make it more difficult to get to in the first place, not just stand about on PI. Make it 33 + only more difficult to kill through to the bosses and make sure it cant be exploited the way euro was.