Looks good, except this part:
Step 4 - Expert consultation: several trusted top level players whose inclusion in the tournament is not in doubt - will be asked to slightly nudge up or nudge down everyone on the provisional seeding based on their knowledge. We will take an average of this to alleviate any bias.
Players are competitors and I would only ever expect them to act in their own best interest (use the strongest units/commanders available, etc). With this in mind, you're gonna ask already-in players to pick who they will play against? They should obviously give you bad intel, to bring the bad players up and push the good players down. Right?