It would be more helpful and transparent if personnel availability would be shown on calendar even if they are not assigned to a team. It allows better planning. What happens now is we can plan full day work for 3 installers (planning is normally made 1 day before) and after installer is assigned we find out that he is not available. It is much better to know it when you are actually planning, before installer is assigned. Now, when day is planned and you assign installer you find out that he is not available.
Feature that you created is great, but please see if it could be modified for maximum efficiency.