Many years ago in time of vanilla Brits were excellent in rush as well, only Russians were superior. They could obtain vils from shipments (the most numerous vils shipments in that time among all civs) and it was really fun to rush people.
Now I am not sure if Brit rushes are so powerful as they were… Like Swedes were added, Lakota could be strong, Japs and Inds are also powerful… I mean the options for Brits are decreasing. I would like to see some form of skirm addition but that is mid/late game option.
Nerf the boom, several people have said good ideas, increase the xp when destroying houses, or decrease the xp that they get when building them, increase the construction time, reduce initial resources …
Add gurkhas in shipments. Rework the worsth polithicals like logistician, etc…
I have read some of the best players say that brittish is level S or A +, but because of their macro and micro intensive they deserve that power. Some consider it the most difficult civ to use.