I'll try a different tact on this one as I personally don't have any issues with this plane after some personal customization. So instead, I'll just say the more universal components of how I envisioned the plane. Collective opinion can use or shoot down the various pieces I will propose.
I won’t go into the physical layout of the plane; but please see the answer to some of my questions on that front (/forum/carceri-geography)
The concept of a “plane of imprisonment” caught my imagination and immediately made me think about one of my all time favorite shows, “The Prisoner” (http://en.wikipedia.org/wiki/The_Prisoner). It may not be palatable to those with shorter attention spans but it blew my mind (caveat: as with any TV show, there are a few clunkers in the 17 episode run). It involves a spy who resigns and is then captured in “the Village” where his jailors try to extract secrets from the protagonist
To quote Wikipedia, “The series features striking and often surreal storylines, and themes include hypnosis, hallucinogenic drug experiences, identity theft, mind control, dream manipulation, and various forms of social indoctrination. A major theme of the show is individualism versus collectivism.”
Some of the major themes involved:
-continual surveilance;
-attempts to control people and break their wills;
-loss of identity (everyone in the series is assigned a number and never referred to by name);
-distrust of other inmates (as one never knows if the other person is really an inmate or a disguised guard);
-a stiffling, insincere civility and decorum that hides a sinister and viscious undercurrent;
-uncertainty of the identity of the jailor (refered to as #1 but the viewer and the protagonist never see him/her or learn #1’s identity) and what is the jailor’s unltimate goal (was it a hostile foreign government trying to learn secrets or was it the protagonist’s own government trying to learn the secrets of why he quit?)
While the protagonist of “The Prisoner” is definitely the hero; the same Kafka-esque themes could work just as well with ignoble beings.
Repeating myself from a different post:
I know that a variety of different types of titans/primoridals/diposed elemental lords/etc. are imprisoned here; but for convenience, I will be refering to all of them as "titans".
In my campaign
I treated the beads as individual prison cells (one innermost sphere per titan). While I had the titan trapped within an innermost shell, his influence could still be felt through each surrounding sphere to lesser degrees. So if a titan of ice was trapped in the sixth layer, he could not visit the fifth layer, although he could still observe the happenings on that layer and create intense ice storms, etc. This continues all the way to the outermost layer/sphere where the titan could sometimes watch select individuals (it would take a conscious effort by the titan) and minor cold effects could be triggered
The whole arrangement (and the prisoner theme) made me think of the Panopticon prison structure (http://en.wikipedia.org/wiki/Panopticon) where a mysterious jailor may or may not be watching what an inmate does and may or may not be working to prevent it.
This leads to a rampant paranoia on the plane, when the titan’s plans for freedom are foiled; they suspect (but cannot prove) the hand of higher power manipulating things to keep them trapped. In turn, the titans act as similar vengeful and petty jailors over the petitioners within their concentric spheres of influence.
So each innermost sphere is a jail cell for a titan; and each layer is a jail cell for the petitioners. The petitioners can never be certain if the setbacks and betrayals they suffer are due to the free actions of his fellow inmates or whether his jailor (the titan) is manipulating things to make him suffer. Similarly, the titan is never certain if its own failed efforts to escape are due to incompetent underlings, rival titans taking counter-measures (as no titan wants another titan to escape before it does), or if it is due to some subtle manipulations from the “divine jailor” that no one is even sure exists.
Who can say if the adventuring party that arrived and undid decades of preparation were just bumbling fools who wandered in at the worst possible time, or if they were agents (or unknowning pawns) in a complex game of chess against an opponent that the titan will never see.