Leader, Left Behind and Sole Survivor Buff suggestions - Meta?

Leader

You're able to organise a team to cooperate more efficiently.

Increases the other Survivors' Healing, Sabotage, Unhooking, Cleansing, Exit Gate Opening, and Chest Searching speeds by 15/20/25% when they are within a range of 12 meters from you.

You are affected by the same effect, but at a rate of 5/10/15% if the other survivor is within a radius of 8 meters from you.

Survivors can only be affected by one Leader effect at a time.

This effect persists on other Survivors for 15 seconds and on You for 10 seconds after leaving Leader's range.

Left Behind

If you are left alone, you squeeze everything out of yourself to be saved, no matter what.

If you are the last survivor of the match, the Perk activates.

While Left Behind is active, your movement speed increased by 7%. Healing speed increased by 30%. Exit Gate opening speed increased by 20%.

The Aura of the Hatch is revealed to you within a range of 24/28/32 meters.

The Effect does not stack(?).

Sole Survivor

You do not lose heart when you lose your comrades, you learn from their mistakes and become stronger.

Each time you get a boost of 7% to the Unhooking, Healing, Cleansing, Sabotage, Exit Gate Opening, and Chest Searching speeds up to a maximum of 21% for each killed or sacrificed Survivor.

Each time another survivor is sacrificed or killed, your Aura will be impossible to read for 20/25/30 seconds.

I tried to improve these perks so that they will be in demand. I know that the ideas came out not very original, but I'm sure that these buffs will positively affect them.

What do you think? Are suggestions too op or too weak? Write your thoughts! If you found my suggestions are good then click the "Vote Up" button!