IMO I love all the halo games and I mean all even reach that so many people complain about it, games need to be changed, otherwise there would not be a new game ..
halo4, 343 can do virtually anything they want with it because it is a new trilogy, and it will still be a halo game because they have the basic things that Master Chief, Cortana and halo unevers and I think Frank O'Connor knows what we want and need so what happens to halo4-5-6, I am probably not too disappointed that most people do not like change ...
and yes you may be disappointed by certain things. all, like armor abilleties of REACH, but I think part of the game ruins the whole game because I love halo, Love Love Love.
So do not be so negative and wait for halo 4 relese and then you can complain about how useless it is