I love the chart. It reminds me of the geek hierarchy thing I've seen floating around.
I've never thought about Geordi or Worf being below Data, unless it was a situation where Picard and/or Riker had left him in command. Operations does sound like a vague enough title to cover just about everything on the ship, but I don't think it does.
Troi really is an oddity! I imagine she would be a part of Crusher's medical team, so her presence on both the bridge and even senior staff meetings is totally extraneous. Sure, if she's reporting about whichever loon is on the Enterprise on any given week, but a permanent position? Is this something that happened on all starships at that time, or is Picard just using his Betazoid tactically?