Something I've been thinking about since I first played Halo 2, Why are the weapons suddenly crippled down?
eg1. Plasma weapons: In Halo CE they were boss, but in 2004, you'd be better off throwing dirt at the Elites.
eg2. Needler: Fires slower, does bugger all damage without firing 20 bullets at the same target.
eg3. SMG: Utterly worthless unless dual weilded.
I hate to be predictable and negative, but these are my thoughts.