Several issues raised about different parts of Simplifi relate to one particular design principle. Namely, that a feature can be so useful that "Everyone Will Want This" (EWWT for short).
Based on EWWT, Simplifi changes the Payee to a "Quicken name" even for users who don't want that done. Simplifi supplies a Category for downloaded transactions even if a user would prefer to do it manually. Simplifi matches Transfers without giving the user a chance to say if the match is correct. Simplifi excludes certain transactions from the Spending Plan or Reports and won't let the user change that. (I'm sure there are other examples I'm not thinking of at the moment.)
I'm not saying that these automatic actions are not useful. Some of them I like very much. But they are not useful for everyone, or for every account. So I propose the following:
Make Simplifi's automatic actions optional by adding an "Automatic actions" subpage to the Settings page and allowing users to turn each such feature On or Off individually.
The default setting for each could be On, because probably EWWT. But the option to turn features Off would at least stem the flow of complaints from users for whom the automatic action just doesn't work.