separation of stamina yes two types

[Alexkos]

stamina at the moment is a quiet horror. After hitting a zombie a couple of times, you can't even run away from it until it recovers, so melee weapons become useful without being useful, it's easier to divide stamina into two types of hit and run, then melee weapons will be extremely useful

 

[smokingpaper]

No.

 

[SylenThunder]

You already have two separate perks for increasing stamina return. One for running, and one for melee. 

Add to that a plethora a boosts from food, drinks, pills, and other reading material. 

What more do you need really?  All you have to do is learn how to use the tools available to maximum advantage and stamina is never a worry at all.