The briefing really should be more... brief.
Cut the medical droids, cut the gossip about recent promotions (and yeah Wedge would make more sense as the leader of the attack).
Cut the Bothan line (nobody knows or cares about them it's a clumsy push button emotion moment),
Just show us tell us that where the Emperor is and how to blow up the station.
It also needs a visual make-over.
Look how naturalistic the briefing in ANH looks and compare it to the 'at all point's fake' briefing in ROTJ.
The hologram would work better desaturated and the room would work better if it wasn't so over lit.