What controls are most similar to Halo: Reach?

Games Halo 5: Guardians
1

The title ^ What scheme is identical or most similar to Default Halo: Reach controls?

2

Probably Halo 4, except that:

  • B is crouch instead of switching grenades - Clicking the left stick is sprint instead of crouch - Left and right on the d-pad switches your grenades.
3

Recon.