This is more a suggestion on how to view Perks and attributes rather than specific examples.
Strength and Vitality are already really strong when it comes to combat, there is no real reason to go heavily into anything else unless you are going out to harvest.
Make Agility perks give bonuses to those who choose light weapons (daggers, throwing axes, spears) and light armor. Giving mobility and dmg bonuses, like increased bleed dmg with daggers, double jump like now but only when wearing light armor.
Grit is already good because stamina is usefull to run after/away in combat, but with a name like grit I think it should be more than just having loads of stamina. Like giving a armor and dmg bonus when being low on stamina, encouraging you to constantly use stamina. Being able to use light attack while sprinting, but it drains loads of stamina.
Having lots in encumbrance should make you a juggernaut, not being affected by slow or knockdowns when using a shield and/or heavy armor. Maybe give HP regen when standing still with a shield up.
Survival should make you a hard f’cker. Not giving a damn about bleeds, poison or gas, it shreds right off. Being thirsty makes you sprint faster, being hungry makes you hit harder.