I don't see how since its Multiplayer and Campaign were miles better than Halo 4, hell I liked it better than Halo 2 or 3 MP, but I'm not going to say the game was better than those.
Halo 4 though? It was miles better in just about every category
Halo 4 had a better campaign, but the multiplayer was a failure. Campaign is what really matters to me though, and that's why I'll take 4 over Reach.
Halo 2 had the best campaign, as well. Great plot twists, an interesting story, the covenant story arc was fantastic, and the mission design was absolutely awesome. I will say that Halo 3 had a very dissappointing campaign in terms of story, but at least the mission design was excellent.
2 and 3's MP modes were vastly better than Reach, especially 2. The map design in Halo 2 was the best it has ever been, and still has not been topped. Maps like terminal, headlong, lockout, midship, turf, etc were all flawless. There is not a single map I would label as ok or bad in Halo 2. Meanwhile, Reach's map design was absolutely terrible. They had terriblely designed, the map flow was broken with AA's like sprint and the jetpack. Not to mention how slow the movement speed and jumping height were. Top that off with extremely random bloom and vehicles made of paper and you have a broken MP.