If you set sprint to toggle, certain actions like vaulting will reset your character to walking speed but not your "sprint state".
Toggle sprint = sprinting > vault over object > toggle sprint = nothing happens > toggle sprint = sprint enabled
I understand if crouch sprinting is not going to be possible, however, toggling sprint whilst crouched results in nothing happening. In Insurgency 2014, toggling sprint whilst crouched cancels the crouch state and allows the player to sprint. It would greatly improve player mobility if this were to be re-enabled.
Toggle crouch > toggle sprint = nothing happens
Toggle crouch > toggle sprint = crouch cancel + sprint enabled
Same complaint as crouching. One button press to go from prone to sprinting would be a great QOL improvement.