Most of humanity loses any name past their first except for the tenth billionth percent who are Blood Named(Lab names are an internal honor if they even exist after the Society Debacle and carry no coolness factor outside of Clan Labs) leading to people wondering if they want to meet up with Fred Wolf, Fred Wolf, or Frederick Wolf. Confusion abodes especially in postal delivery. The most interesting faction is suddenly . . . the Caledron Protectorate who the Clans ignore since it doesn't border the Inner Sphere exactly. The Marian Hegemony would be around as well for similar reasons, but they'd still have that awful emblem. Thus, they have to sit in the corner and weep for lack of coolness.
Honestly, the most interesting thing would be the hundred of stories of rebellions against the Clans while actually. . . the first few of them would be awesome. After the tenth, readers would probably claimer for the Clans to die already to prevent confusion over who was the janitor in that one scene was Fred Wolf, Fred Wolf or Sven Wolf. Eventually Clan society would be unable to deal with all of the so-called bandits including the social outliers that appeared in some Inner Sphere societies such as the hippies of Gogh-Bukowski, and eventually it would collapse due to the lack of social mobility and the eternal enemy of all societies stagnation.
The Clans as a fictional force lose all kinds of interesting aspects once they achieve their goal. The next interesting point for some is when the corruption or "taint" sets in. Sibkos of overly overfed sibkins barely fitting in their cockpits for example would be a good one for some since it would show the decline of the Clans as elites to pampered nobility that they once looked down on.
The better course is to probably give the Clans Terra but not the entire Inner Sphere since that gives them something to keep going for as oppose to becoming complacent and tainted, but that's my nickel's worth of opinion on the issue.
