Absolutely.
If it was difficult to recover her body, as the use of all the fire and rescue equipment suggest, then it is quite likely that many of Joanna's 43 injuries were obtained during this procedure. also, we need to know whether or not she had any injuries prior to her attack and death.
Jo worked outdoors. Who is to say that she did not acquire some injuries during the course of her work? I can count four or five on myself that have been acquired through cooking and ironing!
Pathologists are very quick at determining the type of injuries on a body, and whether or not they occured post mortem. I would go as far as to suggest that this will be a major part of the exercise and nothing else will be looked at until each and every injury is documented. If the report suggests that there was a violent and sustained attack on Yeates you can be fairly certain that the injuries are of a type the supports this argument.
If you are in any doubt about how easy it is to spot the differences, even to an untrained eye, try this exercise. Get a large piece of fresh steak on a chopping board, smash one end of it with a hammer six times in the same spot and then examine the damage, and specifically look for the bruising (which won't happen). Then get a sharp knife and stab the meat at the other end six times in the same area and the examine the bleeding.
Now stick your leg on the board at belt it six times as hard as you can with the same hammer and watch what happens over the next minute or so, and the for the next couple of hours. Then stab your other leg six times and watch what happens.
Compare piece of steak with leg. Note any differences.
Congratulations, you are now a pathologist.
AH