GWS were bulldozed in contested possession by the Dogs in the prelim - a team younger and with fewer games experience than them. They obviously want some experienced players that can commit to the contest.
I think you're right but I also think they've overreacted a touch but I guess they can afford to with their list.
Mz and MDB will be depth imo and brought in more to just be positive influences around the group and club more so than as players in their first 22.