Teams rushing our half back isn't having a massive impact on completion rates. If whoever wrote this watched our games they would realise, stupid offloads, unforced drops and lack of discipline are the major cause. Forced pressure on the half back in relation to errors would be a very small percentage of our drops.
Not trying to defend Katoa, because he hasn't been good. However, I think he would be better with forwards going forward better, lower errors putting us in the red zone more often and giving him more space to work his magic. TO the above point, teams are able to pressure him because we are under pressure due to the poor completion rate, not the other way around.