Changes to Conqueror on PBE. Better or Worse? You Decide

Changed to:

"Attacks or spells that deal damage to an enemy champion grant 3-15 Adaptive Force (based on level) for 3s (8s for melee). Stacks up to 5 times. When fully stacked, heal for 10% of damage dealt to champions and convert 10% of that damage to True Damage."

from:

"Entering combat generates one stack every second for the next 3.9 seconds. After reaching 4 stacks, your next basic attack against an enemy champion consumes all stacks to grant 6 − 35 (based on level) bonus Attack Damage for 3 seconds and converts 20% of your damage to champions to true damage for the duration. All stacks will wear off after 3 seconds of not entering combat. Melee champions refresh the bonus damage duration by triggering combat effects against enemy champions."

Main list of changes I noticed:

• Changed bonus Attack damage to adaptive force
• Overall increase to damage gained based on stacks: (3-15) to (15-65) total Adaptive force, if I'm doing the math right (correct me if I'm wrong)
• No longer refreshes for Melee champs, is always a duration but melees are longer
• True damage conversion cut down by half (20% to 10%)
• Now heals for 10% of that damage you deal within the 3 or 8 second window
• Has to be attacks and spell damage against champs, no longer build up from minions and then charge/dive in

So, this is a change overall, but because I have no idea how this will affect the game right now unless I try it on PBE, I can't tell if this is a buff, nerf or general balancing.

Discuss below on what you make of this.