Normally you only have only two ring slots, but I wonder if there could be a way where you will need to craft an item of some sorts... like a Ring Box to unlock extra slots... up to a configurable cap.

Say for example the the config is set at 5 Extra Slots, there could be a config option to lock the extra ring slots until you 'consume' a Ring Box to unlock a slot. Could also require configurable XP Level amounts to unlock extra slots.

Ex. 1st slot needing the Box + 5 Levels, 2nd slot needing Box + 10 Levels, 3rd Slot needing Box + 15 Levels, etc.

There could also be a Penalty of some sorts if you happen to get KO'd with unlocked slots. You can set a config option to lose a extra slot upon dying so that will mean that you'll need to unlock the slot again. There will need to be some sort of failsafe for those with 'keepInventory = true'. Maybe temporally slots that doesn't grant any effects? Put it in your inventory? etc.

The unlocking is a planned feature, the penalty is probably not gonna make it into the mod though, it only creates more problems to me.

Is this still being considered by any chance?

It's still on the table, but I simply can't find the time to work on new functionality atm