I would hope that at the very least the required characters would make sense for the specific Galactic Legend. So Wampa and Hoda are not really viable. Maybe one or both of them for a Galactic Legend Luke, sure; but not for Rey or Kylo.
I do think we'll see some new characters soon that will be requirements; Richard E Grant's character for Kylo, a new version of Leia belonging to the Resistance for Rey.
Personally speaking though, everything requiring Relics is sapping the fun out of the game for me. I don't expect to be able to compete with the "Whales" or "Krakens" but I also don't expect to have to get 13 characters to various levels of Relics for each Galactic Legend. I've been farming away since the announcement and I've only got three characters to the required Relic level so far. Might take me until the end of the year to get 13 and then I'll only have one Galactic Legend. How many will be out by then? How many F2P players, or even casual spenders, are really going to be happy with that?
I don't think this bodes well for the long term viability of the game but I am open to being proved wrong.