I'll never understand the Halo fans that hate the multiplayer in Reach.
I've been playing Halo since CE, and I'm good enough at the game to understand the nuances of what makes the combat great (I can post my ranks and whatnot from Halo 2 through Reach if it's demanded). Reach has great multiplayer.
Now, if you are a stickler for Halo: CE's brand of balance (uneven), speed, physics, and sandbox toys then yes, you will hate Reach. But that's not a problem with Reach, that's a problem with ANY change.
Halo CE fans also hated Halo 2 because of the shifts dual-wielding, rocket lock-ons and the noob combo brought to the balance.
They hated Halo 3 because of the equipment and a few other reasons.
Now they hate Reach because of reticule bloom and AAs.
Honestly, the only problem I have with Reach is the quality of the out-of-the-box maps, and the fact that the Forge doesn't offer more texture packs for users to get visually creative with maps. That's it.
I don't need to jump into a game of Slayer Pro, Arena, MLG or Classic to show I have a huge e-penis and that I know what 'real' Halo is. AAs add new dimension to the sandbox, and the reticule bloom helps keep potentially unbalanced weapons like the DMR in check.
I love it, and am happy to be getting new maps for the current Halo sandbox.