Intertwining Lore is Great. Do more.
How you connected the lore of multiple champions in the Bio's of Azir and Xerath was really great. It is hard to appreciate this stuff when we are present for the releases of their lore, reading them back to back, but imagine yourself as someone who is just beginning to read the lore a year from now. To find these tidbits like Xerath unleashing brand from is sarcophagus or Xerath being the one to kill Azir's mother and father would be extremely rewarding if you had happened to read Xerath's lore after that of Azir or Brand's. It also makes the world field more lively and connected, it isn't just a bunch different factions who happen to have their own stories, these are places on a globe and inevitably they will interact.
Please, keep doing this in the future.
(the conquered land that was excused for having their mages murdering the Old Emperor and his wife and new born kid, when it actually was Xerath...Shurima maybe the ones that attacked Urtistan in Zileans lore way back when). And the most strange of all
(we never did found out what happened to the immortal flame monster that Nasus and Renekton battled during Azirs Ascension ritual, Perhaps it went to the Freljord afterwards).