This could be my ignorance showing, but if Garland (who is on record as being a defender of the rule of law) wanted to score high on the Richter scale, he might have nominated more special prosecutors.
1) Jack Smith on the document theft and insurrection
2) someone tasked with co-conspirators in the legislature
3) associated crimes at the departmental level, notably Postal Service (remember the wrecked mail counters?) and Secret Service (erasure of communications on the 5th and 6th), maybe DOD with the sabotage of national guard response …
4) dismemberment of CDC and firing of various inspectors-general
5) Supreme Court justices lying at their confirmation hearings