Increase and/or remove the level cap off armor.
After 160, instead of every level perhaps do every 100 or even 500 levels.
To remove the problem with making everyone have to get new gear, also add a new skill tree to the crafting skills that lets you upgrade your gear to a higher level. You can have one skill per gear type so one skill for your armors, one for your weapons, and one for your one for your jewelry. These can also be broken down into different groups if needed. For passives, you can work in things like making it easier to increase the quality when upgrading the gear. You can possibly work in the ability to add an extra trait/enchantment onto the gear.
And to make it less of a shock when you implement this you can give each player an item (or a few of them) that will let them upgrade their gear free after the new feature is put out.
I was almost going to suggest that you add an item to the crown store that would let the player pay money there instead of gathering the needed crafting materials to upgrade their gear, but I worry about whether that would be considered pay to win. I think no, because it would simply be shortcutting to the same level everyone else can get, but at the same time, I could see yes, because that shortcut would give players a temporary edge while everyone else tries to go the non-pay route.
Additionally, you don't have to add any new metals/leather/cloth into the game, you can just add a new item that you mix into existing materials to make it become a higher level.
Perhaps you can even make it so the only way to get the higher than 160 level gear is to use the upgrade crafting skill. Then the only thing you have to do is to add the different upgrade items to the drop list and everything else stays the same. And with that in mind, we would obviously want a hireling for this new skill tree to make it easier to collect the upgrade items.
Edit: And to remove the grind factor for players you can allow for the skill, (at max level) to auto upgrade any gear you are wearing, when you level.
Edited by Tornaad on August 26, 2021 4:00AM