Oh yes please...maybe even upgrades of single perks once tree is full; i.e. at lvl up you get a bright engram and a skill point to use on the tree to buff a single perk, precision dmg increased by 1%, nade dmg increased by 1%, jump height increased by 1mt, barrier resistance to dmg increased by 1% etc. To maybe a max of 10 or 20 buffs per perk, gives a bonus to those who play day in day out compared to who plays a more random game as well.