Just to clarify, so anyone who comments in the future know exactly what I'm suggesting:
1) UR staff picks ~5 outdated characters from a single clan, and player vote to decide which of those characters receives an upgrade.
2) UR staff creates a newer version of the old character, and makes it available to players who complete certain missions or achieve certain goals. Same rules as Ld characters apply.
3) Repeat for each clan, once a month or so, until every clan has an upgraded character.
4) Newer clans like Frozn
or Berserk, or any new release clans after the start of Upgraded characters, will be chosen by UR staff without players voting.
In the end, 22 new characters that replace old, unusable characters.