Give the example that @bored gave about Star Crusade earlier in the thread this is something I have been thinking about a lot for any new Fading Suns game, also keep in mind stuff that I observed on Arx.
To start with I am looking at having a much flatter structure for feudal/whatever power holders. On Arx a baron gets pretty much the same ways to interact with the economy/systems as a duke but with smaller numbers, all dukes report to a head of house whilst having marquis level nobles reporting to them, etc. This is both not very interesting and pretty weird if trying to emulate any kind of actual feudal hierarchy and its snakepit messiness. Playing a duke I ran into a fair bit of griping from say, counts about how poor and unimportant they were, let alone barons. Anyone not a landed noble was basically not on the scale at all outside of the head of church guy, who was an NPC who then politically shot the faction in the head before being replaced. It was all very dependent upon having a head of 'faction' (High Lord tier) who was active and you got along with and people were almost inevitably super in lockstep with said person as a result.
So my plan is basically two 'tiers' of IC power holder. You can have a 'minor benefice', which means you spend points in character generation to get a small income of abstracted strategic resources (Cash, Manpower, Industry, Influence, Technology, etc). At this point you are very much not a 'power player' but could be a landed knight, a rich priest, a guilder with investments, or perhaps somebody with offworld assets who has diverted significant resources to their benefit whilst they do stuff 'here'.
Or you have control of a full on 'Benefice', which could be controlling a barony or county, being a bishop, controlling a major business, being a mayor, etc. These are all pretty much on the same tier with the richest perhaps 2.5 times the income of the poorest and the things bought using character generation points. There are also ICly a lot of people at this level, a few hundred, meaning that the vast majority will be NPCs presumed to exist and able to be persuaded to actually help or hinder using Influence.
A count is only really different from a baron in that they have a benefice giving (most of the time) more income and also a half dozen baronies loosely affiliated with them, these baron tier people nominally owe them a certain degree of military service but in turn a count has a higher military obligation to their liege. Not all barons report to a count rather than a duke, hell, not all feudal benefices are owned by a baron, you can be a knight and have one if your title is rich but not titled, a landless count, or an abbot with feudal obligations for your monasteries' land grant.
So, effectively, no 'hard' factions. The bishop of Ramlah, the Count of Ramlah, the various guild leaders of Ramlah and the landed nobility of the county? They are not at all assumed to be working together. If the Count turns out to be useless then one of the barons or baronesses can step up easily enough, or perhaps the Bishop gets things done, or perhaps everyone raids each other, goes into debt and ends up owned by the Reeve Director.
All Hawkwoods? Definitely not assumed to be working together. Any positions above 'I have a benefice that is particularly rich' would come down to ducal positions, being a general or admiral, treasurer, etc. The intent is very much for these to be appointed or voted on, temporary and volatile.
Top level leadership being mostly NPC at least to start with, in the form of two (Well, three counting offworld) ducal titles and the archbishop but the most relevant duke being largely incapable. Plus a city council running the capital/main play area, which would likely be PC dominated.
So essentially not putting some people at the top out of character generation because they applied for an empty slot and trying to avoid any character becoming a 'bottleneck' unless they can be easily ICly replaced. If some knight manages to wangle a position of 'Lord High Admiral' then fails to keep their peers happy about it? Then they can and will be replaced.