I love the Hogwood Mozart Requiem, but it’s a curio because he refuses to use any notes that might have the taint of Sussmayr, so it sounds very truncated. I think that is being a bit extreme, since Sussmayr was an accomplished 18th century composer, had been a student of WAM, and was the choice of Frau Mozart to finish it off.
You are right about the "truncated aspect"...
Sussmeyer addition sound right ..
But to defend Hogwood choice, observe that it drive the orchestra and chorus and soloist as in an opera not as in a mass... This dramatic choice is the reason why in my mind this version is so enthralling and hypnotically efficient suggesting at the same times what lack in any other version : the childish fear of death and fear of the Grime reaper and the childish innocence and aspiration to death as a mother; the two contradictory emotions creating the drama ...
No other more liturgical interpretation touch it ...
It is like an operatic mass...Or a sacred Mysteries introduction as with "the enchanted flute "mysteries drama... Mozart was a serious freemason after all ...
Hogwood is a genius...