Yes, because Fingon is killed. His younger brother Turgon 'inheriting' his followers isn't going to be too hard to explain. It's not like they can just go home to Mithrim after the Nirnaeth.....
We will have to explain where the House of the Mole and the House of the Wing come from. They can be younger elves who choose to join those houses rather than the houses of their fathers. Or they can be 'inherited' from Aredhel and/or Idril. Since Aredhel both leaves the City and dies tragically, it would make sense for her son to 'inherit' her followers at her death...or for another house (Penlod's) to 'absorb' them at her departure.
We will have to explain where the House of the Mole and the House of the Wing come from. They can be younger elves who choose to join those houses rather than the houses of their fathers. Or they can be 'inherited' from Aredhel and/or Idril. Since Aredhel both leaves the City and dies tragically, it would make sense for her son to 'inherit' her followers at her death...or for another house (Penlod's) to 'absorb' them at her departure.