It amazed me how poorly the Radiant Citadel was conceived and designed. I mean, it shouldn't have, considering the current quality of writers, but nobody considered 'hey, how do we at least make this a tough nut to crack for the murderhobos?'.
If this was their attempt to replace Sigil (as I've speculated), it was hilariously inept.
I think we talked about this a while back the last time it was brought up, but a murderhobo party probably isn't going to waltz through and take over the fag citadel without a problem. Yes, the design of the super duper you can't touch me shield is absolutely retarded (yes let's base the activation of our shield around getting fifteen different Speakers to come together and agree to power it up all at once, leaving us completely screwed if even one of them is captured or killed), but the splatbook states that if shit hits the fan, the party would be facing (bare minimum) a dozen archmages, twenty mages, and a large number of veterans, as well as whoever else the DM decides happens to be in town that day. On top of that, one of the Speakers is also an ancient brass dragon (and a jeet), so, y'know, have fun with that. It's obvious from the design that they wanted to ensure that no party of chuds would be able to go on a murderous rampage killing all the fags and darkies in their way, not only by filling the citadel with far too many powerful enemies to kill all at once, but also by erecting a completely impenetrable "fuck you I win" shield if they even try an external assault.
That said, it's laughably retarded how much power is invested in the Speakers, opening up quite the opportunity to destroy the citadel through political maneuvering. Any Speaker can simply shut down all of the transports to and from the city, and only the Speaker who did so can reactivate them. This basically means that a single Speaker could hold the entire city hostage until he gets his way, and then keep doing that over and over. Yeah,
supposedly this shouldn't happen because something something only the good and pure and noble and right thinking can become Speakers, but anyone with half a brain knows power corrupts. And it doesn't seem like there's any process to remove a Speaker, with the rules only mentioning that their term ends either after ten years, they voluntarily step down, or they die. Maybe that dragon could bite the guy's head off, but good luck getting any cooperation after that. Furthermore, if any Speaker dies or leaves the citadel and a replacement isn't found, literally
everything starts to shut down thirty days later. It's ridiculous that pretty much the entirety of the citadel's functionality rides on the continued existence and cooperation of a few people, but obviously the writers were too busy creating their fag utopia to think about the consequences of its commie design.
Thus, through some acts of subterfuge, likely backed up by a suitable army and powerful spellcasters, a sufficiently motivated party could take control by removing Speakers from the board and allowing the army to attack unhindered, as in the example from the video above. Imagine mind-controlling multiple Speakers to keep crippling trade until their nonsensical demands are met, or kidnapping one and replacing them with a simulacrum so that the citadel eventually stops functioning and nobody can figure out why. It still wouldn't be a cakewalk, but it would certainly be doable. You could even position yourselves as the citizens' saviors by freeing them from a totalitarian regime that is more concerned with their petty squabbles and maintaining their vast wealth than the needs of the populace (before taking the treasure yourself, of course).