There is really only one scene that is just Qui-Gon and Obi-Wan sitting down in the conference room discussing the trade dispute. It is about 20 seconds long, and it basically consists of the Jedi being served drinks by the protocol droid, Obi-Wan commenting on how long the Neimoidians are keeping them waiting, and Qui-Gon saying that he senses "an unusual amount of fear for something as trivial as this trade dispute."
Then we cut to Darth Sidious appearing for the first time to the Neimoidians, contemptuously upbraiding one of them for his cowardice (remember? he calls him "stunted slime"), and then ordering the Neimoidians to kill everyone immediately.
Then we cut to the Republic pilots panicking as a gun emplacement suddenly swivels toward them, right before the transport is blasted apart in a huge, fiery explosion--at which point we cut instantly to the Jedi in the conference room suddenly leaping up and dramatically activating their lightsabers.
This is essentially all there is of the boring trade dispute talk in conference rooms that supposedly had people falling asleep in their theater seats. There's like a single twenty-second scene. Obviously that scene is given a relatively calm and uneventful vibe (though with hints of something maybe being not quite right), because it is supposed to provide a contrast to the sudden carnage inflicted at the command of Darth Sidious, which causes the Jedi to instantly leap out of their seats and spring into action.
This is literally good pacing.
When you point out that the pacing here leads to an opening most similar RotJ they suggest oh but RotJ had so much more tension. The same folks suggest that prequels tension is lasting because lack of danger to certain characters. Ok then so who is in danger in that opening? Certainly not Vader. The imperial officer? "Is Vader going to choke this random nameless officer we just met for 10th time" is tension? The menace of the scene comes principally in the threat of the emperors arrival, and I would not say a verbal threat of a future event is exactly trying to go for maximum dramatic force. Which is not actually a problem, its meant to be slower build so that Jabba isn't overly eclipsed too quickly by the Empire. Much slower, in fact, than TPM.
The pacing of the scene here is meant to establish menace. You know, like in the title. We then go to the conference room and watch our intrepid heroes talk while we also watch a secret conspiracy plotting their death they are oblivious too. This is known as dramatic irony. But these guys do not know what that is. They do not know *anything.*