This is an interesting discussion. The way it works on my team is that each individual is responsible for his/her own training, and his/her own approach to the season and any given race. The team has training sessions (Sat group ride, and one practice race 'camp' this past year), but if they conflict with your training plan, there is no pressure to sacrifice your plan in order to participate. If you want base instead of a high intensity group ride, you go do your base. The team does try to hold group rides that make sense for the time of year: keeping it easier during the period most people are doing base; cranking it up and awarding sprint points as we get to the season. We have a fairly large team by AZ standards, and for any given race, subsets will be racing together. Those folks will decide to what extent they will work together, or for a particular member, based on individual goals, strengths and points standing. If someone says "I really want this race", then those in his category are going to help him win. Members who are leading in season points are going to get support unless they say they don't want it. They are essentially considered 'captains' for that category. Winners are encouraged to share their prizes with those that aided them, and they can also give out 'team points' to those that helped. I have enjoyed helping a teammate win, and would never adopt a strategy that threatened my teammates chances without having discussed it in advance. If I'm planning a specific attack, my teammates know it. I invariably ask the strongest teammate in a race what I can do to help him win. But, at least in the categories I race (I have teammates if I race 50+ or Cat4 but not when in 55+) there is nobody having a pre-race meeting saying "Okay guys, this is what we are doing." It's more casual and fluid than that.
On the coaching front, it's similar to the way team bikes are handled. There was an offer to buy team bikes at a good discount. Some took advantage; others didn't. We have a coach that was introduced to the team and has given a few lectures to us. We were encouraged to work with him and his local associate individually. They are very metabolic-testing oriented, and have their testing setup at the LBS, so they are a constant presence. Even those of us who have not signed up for their coaching have adopted some of their methods by osmosis. But the coaching is of individuals, not the team. I believe it needs to be that way, as we are individually responsible for our fitness.
Given the economic realities of how teams work, with most of them affiliated to an LBS, there is a certain amount of 'buy-in' or more accurately 'buying' that members need to do in order to adequately support the team. Shop supports the members - members support the shop, and the services affiliated with that shop. But those products and services need to be a good match, at the right price, or the members aren't going to buy in and the relationship and team will flounder. The coach working with my team is really good in a lot of different areas. He is a respected Phd physiologist, and literally everyone he has worked with has set TT PRs. Not a bad track record. But my needs fall more into what has been mentioned previously. I need to learn how to race, and more specifically how to win masters races. I needed help from someone who does exactly that, and I'm fortunate to now be getting assistance from Racer Ex. Fitness is of course vital, but it doesn't do you a damn bit of good if you don't know what to do when, how to get around a corner, or how to get the most from your power in a sprint. We all need to be individually trained, to build the strengths we need to win with the strategy that will work best for each of us. There is a lot to this sport, and you need to cover all the factors to get on the podium. Fitness - skills - strategy. It all needs to be there.
By the way, with our relatively un-regimented approach, we have developed a reputation for supporting each other well, and for using solid team strategy.