Halo 2 Ranking system was only good because it took a while to level up.
Halo 3 was too easy.
Halo Reach Was good, just no skill system.
Halo 3 + Halo Reach - Halo 2 = Win.
No, it won't.
They said it would be too much hassle and take too long for such a "small feature."
So No. it won't happen, however, controls are being tweaked as we speak.