"does anyone just use the Suite Convolution Reverb on its own anymore?"
Yes, I made a piece for satb choir, organ and 2 trumpets and don't possess a church venue from MIR. So I used for the organ the Maria Strassengel convolution reverb, sounds in incredibly good. For the choir and the 2 trumpets I was a little naughty, I used from MIR the Vienna Konzerthaus Grossersaal in combination with MIRacle the Strassengel factory preset. In my ears it sounds as if the organ (freeware), trumpets (vsl) and choir (combination of Kontakt, Soundiron Micro Choir and solo voices of VSL) are all in the same church. And the people of the choirs were so patient to repeat every time again my notes, when I asked them do so😉. And me: "sitting in the church", composing my notes, with a cup of coffee... 😊