From a coaching standpoint, all of Swingman's questions are valid - but it becomes a matter of priority. Some of those questions need to be answered sooner than others. so, I think you could divide that list into about three sections:
1. questions that need to be answered after Spring Practice. (position changes, rough depth chart)
2. questions that need to be answered after fall practice, but before the season opener (determine starters, who will red-shirt)
3. questions that will be answered during the course of the season. (determine player rotation and depth at each position - as impacted by injuries, etc)
Of course, during the course of Spring practice, fall practice and the regular-season, new questions will arise. you're never going to be 100% settled at every position - stuff is always going to happen.