I do understand Jose's role and importance but what you describe guys is more like "most vulnerable position" and this vulnerability comes in play only if Jose gets injured. The strange thing is 2&3 positions are the weak spots even with the all team healthy but we seems to be worry about PG which is covered by Jose.
Last year, CB4 was the main anchor in Raptors
game plan. This year, JO takes over some CB4 responsibilities to carry the team but still CB4 is the main focus. Jose role is to assist these two guys or to find the open swing when CB4&JO attracts too much attention.
Here is my top 5 for most important player: