I've been a ProSeries customer for close to a million years.  I also use SmartVault.  I agree the data scan programs you mention do not work with ProSeries.  But from what I read I'm not too upset by that.  Because W-2's, 1099's, 1098's, K-1's, etc. are not standardized (why the IRS doesn't mandate this I'll never know) I really don't want to spend more time reviewing whether the import or the scan worked correctly or not.  

For the fact that so many people have problems with Link, E-signature, ProSeries Cloud servers, etc. I don't need more headaches of that either.

I'm not looking for integration.  I'm looking for more features.  For example in Maryland we have to file an annual Personal Property Tax Return. We have the data in Fixed Asset reporting, why can't Intuit just complete this return?

I have many clients who have proprietary software that is great. And QuickBooks is great.  But sometimes the link between the two sucks and we waste more time trying to figure out why inventory is negative $1m and the balance sheet is out of balance, etc.  I'm at the age where I want simplicity.