» Sat Jun 02, 2012 6:32 pm
You aren't imagining things. Faction content in The Elder Scrolls has been steadily decreasing over time.
Morrowind (2002):
11 joinable factions with full quest lines-
Great Houses: House Redoran, House Hlaalu, House Telvanni
Professional Guilds: Fighters Guild, Thieves Guild, Mages Guild
Others: Imperial Legion, Imperial Cult, Tribunal Temple, Morag Tong
Bloodmoon: East Empire Company
All factions had full and robust questlines with many hours of content. In addition, attribute and skill limits to advance in rank were present ( you actually had to be GOOD at what they did to advance, or even join, in some cases). Faction disposition also played a role, so as a member of one faction, you couldn't join your enemy or rival (cannot do all factions in a single playthrough). Quests are static in difficulty, as are most opponents ( you can't become guildmaster at a low level)
Plus three joinable vampire clans, each with a few quests and their own ranks (depending on the clan of vampire that bit you)
Oblivion (2006):
5 joinable factions with full quest lines-
Fighters Guild, Mages Guild, Thieves Guild, Imperial Arena, Dark Brotherhood
Several other minor factions related to single side quests or factions quests.
Knights of the Nine is joinable, but as advancing in their ranks is integral to the main quest of the expansion, I put them in the same category as the Blades (they don't count as a faction distinct from a main quest, but are technically joinable).
The are no skill or attribute checks to join or advance in the factions, faction members, quests, and quest rewards all scale to your level (you can finish any faction questline without ever leveling up or becoming good at what they do). In addition, there are generally less overall quests per faction. There is no faction disposition system.
Skyrim (2011):
6 joinable factions with full quest lines-
Companions, College of Winterhold, Thieves Guild, Imperial Legion, Stormcloaks
and the Bards, a minor guild, among several others
No skill or attribute checks for advancement or joining. The only faction disposition present is the binary between Stormcloaks and Legion, none of your other memberships or previous quests have an effect on your ability to join them, they are simply mutually exclusive. While level scaling is somewhat better than in Oblivon, the overall content of each factions' questline is even less than Oblivion, enabling you to race through each faction.
Source: UESP wiki.