TL;DR -
Remove skill-specific (skill modifying) aspects from legendary items and put them in the skill tree/ paragon boards so that players can respec what is central to their build with skill point refunds.
There are 3 categories of legendary aspects (excluding Uniques):
1) Skill-specific aspects that MODIFY skills, like;
Whirlwind periodically Pulls enemies to you
2) General/buff-related aspects, like;
Deal 58% increased damage while you have Barrier active
3) General skill-related aspects, like;
Thorns damage dealt has a 48% chance to deal damage to all enemies around you
Basic Skills grant 25% damage reduction for 5.0 seconds
Some have complained that power scaling is feeling out of step with enemies scaling to character level, while players scale with skill points and item power spikes.
The problem here is that builds are tightly controlled by aspects you find on Legendaries. This is part of why Kripparrian commented in his D4 beta review last week that he is afraid that D4’s endgame will be just players trying to find the same items over and over, just with higher stats, but same affixes/aspects.
This problem means that players cannot reasonably swop out their build unless they have all all legendaries with all aspects for all builds, which isn’t reasonable, and creating a new character for a new build isn’t everyone’s thing.
This is one of the reasons why players feel like the Skill Tree isn’t advanced enough in D4
Solution (possibly):
1) Remove category 1) SKILL-SPECIFIC aspects from legendary items and put it in the skill tree/ paragon boards.
Keep all the other aspects in the codex, and legendary items where they are currently.
This solution operates like Lost Ark’s Tripod system (skill point allocation) that is attached to a mini tree with 8 options which can freely be respecced.
Lost Ark’s engraving system also is similar to D4’s category 2) and 3) general and general skill-related aspects, which you need to acquire through trade and looting.
2 ) Obviously this will necessitate bonus skill points through Renown, Feats, or baseline skill points must increase… preferably ASPECT POINTS so that the extra points cannot be used to accelerate the skill tree progression balancing, but must be used only on the aspects for skill modification at certain level milestones.