[LTGLambChops]

From what it sounds like, I would simply get everyone on the team that doesn't like the way things are running and either sit down with the coach and explain that things are not sounding the greatest and you happen to have some ideas you would like to interpret for the variation of people since everyone likes to do something different. If this doesn't work with coach Z's schedule, go talk to another team about it locally to help get students trained on their respective topics. Coach Z will become very confused after some time, but simply sit down with another teacher at your school who might be interested in the club and tell them what Coach Z has been doing simply asking for help from the teacher. Getting training from another team will be helpful and open up for collaboration from that team once season starts.

I hope this helps!