In halo reach Spartans and elites were completely different
and I half to say it was great
I think this sould stay in some way
SO here is just some ideas
Spartans:normal speed and jump normal. shields regen normal. health doesn’t regen
Elites:Slightly faster and jump higher then Spartans (Only a little, not as much as in reach)Shields regen normal but health regens
Forerunner(if there):Slightly faster then Spartans (like elites in reach) but jump normal. Health regens but shields regen faster then normal
Thats just and example But still the main point is I think the choices for favorite player choice sould have different abilities.