I also use QB and it is probably the worst software I've ever used. Its clunky, slow and antiquated. I really hate it, but on the same boat as others here, can't really dump it.
Why? Because your accountant requires it? Are there other reasons?
Could you change your accountant?
I'll make it simple.
The reason you wont find the answer you seem is also the reason there wont be a competitor (3rd competitor for xero and qbo) in the space.
There is no 1 killer feature to solve for.
There is a long list of pain points that need to be addressed. This is why any accounting software needs to be built by an accountant for accountants. Otherwise its just another piece of software.