I don't think anyone at Ubi will ever get into this idea because most players seem to just turn stamina off and then sprint as fast as they can. Yeah, I used to do that too, I wanted to collect everything as fast as I can. But now I want to enjoy the Island and explore it in low pace.

But in this search for realism I'm having a hard time finding the right speed for my actions.
The thing is, we have basically 3 keys for movement, one for moving forward jogging, another for sprinting and another to toggle to slow pace.
Being a tactical game I want to crouch behind covers, then stand up to jog or sprint to the next cover. Before pointing my rifle in search for targets I want to walk slowly and look around instead of pointing my rifle all around.

So it works more or less like this:

*Wall of enemy base is 100m before me
- Toggle normal to slow
- hold directional keys
walk towards while looking for enemies
- hold directional keys
walk against the wall to next corner
reach corner
- toggle crouch
peek with scope
see enemy 200m ahead, decide to make a run behind a short wall.
- toggle crouch
- toggle Slow to normal
- hold directional keys
reach wall
- toggle crouch
peek for the enemy, decide to melee kill
- toggle crouch (not needed if sprint)
- hold directional keys
- melee key
- hold directional keys to next cover
- toggle crouch
no enemy in sight, scout
- toggle crouch
- toggle normal to slow
- hold directional keys

and so it goes on...

I have 2 suggestions that could make these task easier and flow smoother, (hopefully in the next games):
Automate crouch and vault: the character already moves against the wall to lean and be ready to shoot behind it. When doing the same with a small cover, the character could automatically crouch if the player is not holding the vault key (like it works in The Division)
Second: I can imagine such a thing being a pain in the butt to be programmed, but we could use the mouse wheel to change speed, like having something between slow and jogging as the "normal speed", scrolling the mouse wheel up would continually accelerate until the character reaches sprint speed - still having a key to instantly sprint - and scrolling down would continually decrease the speed until the character moves so slow like when we're aiming a assault rifle.

if not possible, at least please make it so that when walking slow and then using sprint and stop sprinting that we can return to slow again not needing to enable slow again.