I've got a bad feeling about Aroden. Starting to think he may not be long for the multiverse.
More and more planes. Outer planes, demi-planes, concept-embodying planes, planes based around archetypal emotions. Most recently a fey-inhabited demiplane of music, full of sentient melodies and (literal) earworms. The good/evil/law/chaos planar creatures that get the spotlight now aren't as interesting to me, and I hope the upcoming alignment changes in the remaster mix up the cosmology.
Maybe a variant that splits the difference, without making every item as bespoke as the Harrow cards? If there's a difference between an item's level and the level of the character using it, adjust any DCs by that amount. For example, a level 8 character with a level 6 Ring of the Ram would have enemies roll a DC 24 save (rather than the original of 22). That doesn't boost damage and the item would eventually fall off the curve, but might be useful for longer.
This would annihilate purchasing economy balancing and I have no idea how to correct that, but it could be useful for found or bonded items where buying and selling is restricted.
What about the Proficiency Without Level variant rules?