Apart from 3 slots (1 artifact, 1 ?, 1 ring) I feel there's a strong need for another column which will also provide much needed expansion for backpack to store few more items too.
But my focus is on the additional slot. Is it fair to have one? I know people will quickly find it problematic on game balance were we allowed to have more but can't there be something interesting that doesn't offset the challenge?
My suggestion is to have 1 more SLOT exclusively for artifact!
BUT it becomes permanent and can't be unequipped to ensure player chooses carefully with consequences in mind. Also this slot becomes available after defeating 2nd boss.
This will solve a major issue I have playing as Rogue or finding a good artifact drop later in the game and prefer not to swap existing artifact after upgrading them to maximum
I am also open for any other use case for 1 more SLOT apart from artifact
Would like community views on this question
The rogue has a t3 ability that allows him to use his cloak even when it is unequipped, at the cost of a slower recharge time. Fully upgraded this reduces the charge speed of the cloak by only 25%, and otherwise the cloak maintains full functionality. What you are asking for is literally in the game, you just need to beat tengu.