I think you're reading too much into Sier's situation. Every time I've watched him he has presented himself in best possible physical condition and has participated in all the training expected of him. The reality is that his body has let him down and maybe he doesn't have it in himself to succeed at AFL level.I was going to post something after a VFL game a while back, but thought I'd leave it alone. Your post on Sier has made me reconsider. On a couple of occasions at the VFL this year, when Sier was sidelined with injury, I've seen him at the ground but very much off to the margins, by himself, engaging little or not at all with the playing group or coaches.
I enjoy my own company, so I tried not to read too much into it, but my (very superficial and probably not representative) impression was of a player who wasn't really 'enmeshed' with the club environment. I'd like to see him around for at least another year, but I wouldn't be surprised if he made his own decision to take the pressure off himself and rediscover his love for the game elsewhere.