I haven't seen him play much in the WAFL, but I think a few things have hurt Erasmus.
The first is Fyfe has been good for us and playing in the middle. There's one spot fewer for Ras to come in.
To date, we've had very few injuries in the midfield. In a normal year you'd expect one of Brayshaw, Serong or Young to have copped an injury of some sort, but they've been incredibly durable.
I don't think Johnson has been good, but he shows something in every game. It might be a fend off, a good second effort, holding the ball waiting for a second and better option. You can see there is something there, even if it hasn't amounted to much in terms of output. Contrast this with Erasmus when he played, and there was a lot of 'not much'. I don't think he's been given a fair chance, but when he has had a chance nothing has jumped of the park.
The last is JLo sticking with O'Meara. I'm not sure I'm quite with JLo on this one. There is probably a complicated team balance argument there, but I feel like that's the spot where Erasmus could have come in.