My interpretation on whats going on is that Smith will be signed as injury cover for Pantellis. There will be no cover for Pav and Lia as they are both expected to be back on deck by Xmas. I guess this means the team has just has to get on with being 2 players short until those two come back. Pav obviuosly can keep fit by running and could do some ball work so he should be ready to slot in quite quickly.
IMO we are treading on thin ice here....Ifills groin injury could further restrict his involvement...if Greenie got injured then there is no obvious replacement. Greenie is a big hearted player...but expecting a 34 year old to lead the line for 90 minutes for every game of the season is plain dumb.
The team has done really well all things considered to pick up 4 points in the first 3 games.
But there is still most of the season to go. Fatigue, injuries, suspensions and loss of form are all going to happen. Having a squad light in overall quality and size is going to bite you on the bum sooner or later.