"so your idea is to remove constant CM, Archon, WW barbs and then give some sets that will give the ability back? Moreover, through another grind? Basically, you suggest nerfing all chars and then make ppl work for sth that they had before but was taken away from them? sounds really lackluster and artificial."
The basic idea isn't that bad. The way he proposes it makes it bad. If you add some super rare items that will make you feel overpowered you will just add another mindless grind as you said and take the fun out of the game for a large part of the player base.
D2 did something similar but managed to keep hardcore player as well as casual players motivated. You did have incredible strong and rare items like Griffons that were designed for very specific builds. But they also had incredible strong and abundant items like Spirit, Vipermage that were very fast to get. This system allowed players to feel powerful almost regardless of playtime but also rewarded the more hardcore players by giving them some extra builds that were not much stronger than the cookie cutter builds but still something special.