For these perks that provide their bonuses at 30% Hp, could they be increased to below 40% hp or similar, so that they work better in conjunction with the Rapid Health Perks?

Not Only that but when you take a mortal wound you start at 35% So even after you get downed you STILL DONT get the benefits of these perks, Ive ofter said to myself dam I wish I just started at 30% instead of 35% on death but no your right better way of doing things would be to increase it to 40%, rather then them lower the revive % to 30. Good point.