Currently wearing different armor type doesn’t affect running speed/distance and grit/stamina consumption at all.
Heavy armor now has much more armor than it had in Early Access and it is fine, heavy armor should give you a lot of armor, indeed.
The main problem is that light/flexible builds can’t do anything vs heavy armor. It is already impossible to play with bow or daggers in light armor vs Legion with 2h sword/pike. Not because of too much armor or because bows are underpowered, but because main advantage of flexible/ranger/hunter/assassin build comes from flexibility, ability to move faster, be able to run away and dodge more. Currently it is just impossible because player in Heavy armor can chase you and if he has more stamina you will never escape.
ALSO currently you can use daggers special attack and dodge wearing a Heavy armor! I suppose it is a bug as well?
It is unrealistic and doesn’t work same as climbing
This is totally unrealistic and I do believe this is a bug. We already have different stamina usage and able to climb higher wearing light armor and can’t climb too far in a heavy armor. Also have you ever seen a knight in plate armor running like a naked guy? Yes? Can you show me that meme please
What can we do now
Let say base movement speed is 100%. I would keep it for light armor, for medium 15% less - 85% and for heavy decrease it by 30% - final movement speed 70%. Also consume stamina a bit more for medium and even more for heavy. Heavy armor should be great for receiving a lot of damage and be mostly unkillable with HP regen and potions, for tanking bosses, etc, and shields apart from armor itself are protecting from knifes and bows, so it is balanced.