That's why this team is destined to die out? 
 
Look at the League the brooding, intelligent, philosophical Batman, the comical, optimistic Flash, Diana the amazonian legend who solves diplomatic incidents by killing her enemy 
The Avengers the dark, former alcoholic Ironman with lots of toys, the speedster Quicksilver with a criminal background and psycho sister, the patriot Cap America and the Thunder God 
 
Annihilators never gave us their personalities

I agree to a degree as most have their personality's known like Gladiator silver surfer & quasar while ronan brb & ikon have nothing personality wise going for them but i doubt they'd give them any since its only a 4 issue mini's they're gonna star in . .

They aren't meant to be a full time team, they all even agreed on such in the first issue. So there really isn't a  reason to give this team much depth because they won't be used like the Avengers or the JLA.