I like the current cast of the Avengers, you have the core cast of Captain America, Thor, Iron Man, Captain Marvel, Black Panther and even She Hulk.
Then you have Ghost Rider and Dr Strange whereas I would've had Vision and Scarlet Witch instead.
The X-Men are doing exactly what the Avengers did with their recent relaunch from No Surrender, a massive line up that will dwindle down to a core group.
With their core group you could have Jean Grey, Wolverine, Beast, Storm, Rogue, Night Crawler and Colossus, time will tell I guess.
Myself I would like to see one core group book for both the Avengers and the X-Men with another Uncanny Avengers title bridging the gap.
The 1st Uncanny Avengers series was sensational the others that followed were woeful.