They've been going with a Big 5 approach recently, and I really like it.
Besides the added humor and diversity the Brave and the Bold bring, I always found the Trinity dynamic boring. World's Finest was a fun buddy cop idea, but the Trinity is usually written in a way in which they all seem too perfect.
In my opinion, these five should be the core Justice League team, and then you can have small satellite teams (like JLU) that are more specialized (JL Dark, JLA, JLI, Young Justice, The Terrifics, Outsiders, etc.) that fall under the same banner and operate in the same base.