I've got a (completely unfounded) theory that the coach, by and large, has **** all influence on GF day. It's all about the energy within the playing group. Good coaches will obviously play an extremely heavy role in building the team's journey to that point, but once the team reaches that point, it's all on the players. It's up to them to put the cherry on top of the cake that represents their season's efforts, and when it clicks on that day, it's pretty insane to watch. The only real influence a coach can have imo revolves around positional shake-ups to try and wrest back momentum eg. Luke Jackson into the ruck in 2021. Speeches will work sometimes, other times they won't. One of the most famous speeches in GF history was made by a coach whose team then lost by nine goals.It's a weird one hey. They've been in a very good seat for a couple of those but fallen short. On the other hand he managed to entirely rebuild them with only a few years in the bottom half of the ladder and always competitive throughout.
If the energy within the playing group is flat or overly nervous for whatever reason (sometimes teams have bad days, and you don't choose them), there's only gonna be so much a coach can do to change that collective energy, despite probably being painfully aware of the situation. Sydney seem to have a monkey on their back about GFs, and I don't think that's a reflection on Longmire much at all. I'd have him up there with Clarko for how he got Sydney to back it up year on year and had them playing sustained, skilled, sharp, disciplined football for essentially more than a decade