As someone who's wanted to see spears become melee-only, I feel their update is still quite boring. It would be very cool if the power attack had an additional effect.
A few ideas for the power attack are;
Pierces through multiple enemies
Is a sweep/slash attack
Becomes a rapid piercing attack
I feel they could also add these attack style options via perk tree, and not just for spears. It'd be really cool to see this kind of customization for all melee weapons.