The Targon lore is fine as it is and set itself apart from becoming redundant battle stories that could easily be Demacia's or Noxus' lore. We now have a story of people of Roman crafts (don't assume just because they live technically in space that they have to be high tech) sustaining a magical inter-galatic empire.
Yes, the characters are different, Pantheon more so than others, but I still appreciate that he brings to the table the same badassary in physical combat, even if it is no longer from a human perspective. He had his human saga as Atreus, time to move on. We already have 3 other human aspects, also, being the aspect in command of your empire's greatest weapon (yet revealed) is a big deal. He now holds, significant importance to Targon's lore unlike b4 where he simply was a third party/Leona's bff.
Also, Leona did not become Shaco and Idk why ppl at like she did:
a) she killed some invading barbarians that slaughtered countless of her tribe.
b) she is a natural bred warrior from the Rakkor.
She simply shifted from only protecting, to actively defending. In other words her lore is a better representstion of how she is actually played in game. She isn't Braum, but neither is she some assassin out for your life.