I'm approaching it with guarded optimism. I personally think ditching the battle rifle was the best thing Bungie did in Reach, as the DMR requires a lot more skill in my opinion, so I'm not exactly wild about its return.
I just want it to be good because I am sick of all the COD-clones. I also want a loadout system for Halo 4 because I am freaking sick of wanting to play just regular, classic CTF or TDM and getting stuck playing nothing but Shotty Snipers or DMRs only or some other niche mode. Sadly, pretty sure it won't happen.
It's sad because I love the Halo mechanics. I love CTF with the vehicles, I love the combat mechanics (AR+frag+melee), and I love the design and style. I just hate the lack of choice in matchmaking. Everything is bundled together, and democracy never seems to agree with me. I wish Halo would adopt the multitude of specific playlists like Modern Warfare (ie, standard playlist, hardcore playlist, not lump all the objective modes into a single playlist, not lump all the niche modes into the standard playlists) and loadout system, but keep the rest of the Halo mechanics as is.