Agree with all except this one.
I know of no paramedics that use anything more than simple suture techniques outside of the hand, face, or joint outside of the war/remote environments, where anything is better than nothing anyway.
Even things like delayed primary closure or reclosing a (forgive my spelling) dehisced wound are relatively simply procedures.
(far simpler than interpreting an EKG or intubating)
Mea culpa.
The training I received in suturing was extremely limited / very poor, and was limited to exactly what you described. But, a common argument for advanced practice has been that paramedics could irrigate and close a simple wound, and dispense a small pack or a full prescription of prophylactic antibiotics (if judged necessary). I think some of the UK paramedic practitioners may be doing elements of this.
Doing this in a treat-and-release environment would definitely required extra education beyond what I believe most paramedics have received.