Obtaining 600 GS BIS items is unavailable for the vast majority of the player base as drops from dungeons, bosses, OPR, or War have like 0.0001% chance to drop a 600 GS item with any decent stats. Crafting those items is basically hidden behind an impregnable gate for anyone except like 5% of the player base.
The 595-600 GS RNG
You need multiple rolls to even have a chance to roll a 600 GS item while the price of all the materials makes it almost impossible for most of the players to do 10 rolls and hope for the 600 GS one as the price of the materials is between 5 to 10 thousand gold per roll.
The perks RNG
Even if you are fortunate enough to roll a 600 GS item most of the time you are going to get only one good perk which you select at the beginning of the craft and the other 2 are most likely going to be absolute garbage. To roll 3 out of 3 perks you want to require like 100 rolls unless the gods of chaos are on your side. And only companies that hold major cities have access to the piles of gold needed to do that, casual players which is still the majority of the player base cant even dream about owning a single 600 GS BIS item.
The Umbral shards going to work only with 600 GS items
So all those who have 595-599 GS items with 2 decent perks can get 600 GS items which much worse perks that will reduce their overall power or somehow obtain like 2 million golds to be able to buy a 600 GS bis set as usual price for one 600 GS bis item is around 100 to 300 thousand gold.
So AGS please rethink your layer upon layer of RNG and allow players to get good gear as it’s right now available only to a selected few and it will lead only to bigger unbalanced in the game. As the richest companies will be running wars in 625 GS BIS items while others won’t be even able to go over 600 GS. As the mutator dungeon system force you to farm for eternity in lower difficulties or obtain several 600 GS PVE gears to be able to complete the highest difficulties levels. This will only result in gating content and end-game gear for the vast majority of the player base and even higher benefits for the companies that own 2 or all 3 major cities.
