[Tauon]

IMO, we need to center all commerce in one Place!
What you guyd think about a commerce room?

I assume you mean making a room that is ported to from Britain. If that is the case:

If you create a particular location dedicated to commerce that is outside of Britain, it may de-centralize the city. People might move from relaxing/chatting around Brit bank and move to this new location. It could essentially remove Britain from the equation.

The current system is one that works very well, in my opinion. Because the mall is located within the city, most people are inclined to head over, do their business, and head back to Brit bank to socialize. It enables Britain to remain the centralized hub of social interaction and commerce.