It is a problem. As a developer who mostly focusing on DM, the problem is more than metadata leakage.

It's a square of

security & privacy

engineering complexity

user friendliness

decentralization

Some solutions solve No.1, keeps No.4 with a huge cost to No.2 & No.3

But I want to balance these 4.

Engineering Complexity is overlooked often but it is very important. Complex solution is hard to iterate/fix later on. It's harder to implement so that fewer developers implement it so it further harms decentralization.