No bloom feels like Halo 2, It makes Reach feel like Halo again in my honest opinion. I personally enjoy the change.
Bungie gave over the Halo series to 343i, and 343 immediately started off with a Title Update to Reach.
The update included modifications to Armour lock, and a 85% and no bloom playlist. (no bloom simply means that the reticle no longer expands when you shoot. and 85% is a reduced expand when you shoot). 343i is gathering info from the community on what they will continue to use.
CE anniversary will feature 6 classic Halo maps rebuilt for Halo Reach, and a new Firefight map. Halo Combat Evolved Anniversary (Halo 1) comes to stores November 15th, 2011.
Someone feel free to correct me if I am wrong.