There's no tactical side to Halo without Armor Abilities. I thought this was common knowledge? All the previous Halo games had no tactics at all. It was just a bunch of kids running around spraying their Assault Rifles.
People seriously haven't figured this out yet?
I was rank 50 just by using the Assault Rifle. It was so easy. Why do you think Call of Duty has so many players? People can actually use tactics by creating different classes and using different perks. Before Reach Halo didn't have this and thus there was no skill and were no tactics involved.