I was critical of Cust last year. He had a tendency to crowd his outside supports and only pass off when they had no room to move, and his defence was iffy at best. The best thing he brought was that he backed up very well.
So far this year though he has been a lot better. A lot more creative with the ball and both his kicking and defence have improved. He's actually looking like a first grader and not someone just there while others are out injured and he's playing with confidence.
When Walks is back, if I were in Des' shoes I'd be moving Suli to left wing in place of Jorge, Walker to right centre and keeping Cust at 5/8.