I'm pretty sure Tivendale had a lot of pine time, however when i did see him (not often) nearly EVERY possession of his was effective (or not a complete stuff up), so i've got no problems with him playing next week.
IMO he is suited a lot better at the MCG, where there is more space for him to do what he does.
I'd like to see him play against the saints at the G next week.
As for Simmonds, i made a post about him in another thread about him, but i wouldn't drop him.