Why I think Teemo deserves more lore!
I think Riot is potentially missing a great opportunity to flesh out a very interesting character, we know generally Teemo's job as Bandle City's best scout, with the primary responsibility of stopping infiltrators from getting in. He apparently has such a degree of efficiency when he's on duty that he's considered one of the most dangerous yordles alive. Then there's that cheerful aspect of him that completely "Switches off" during combat, he clicks off his empathy so he can do his job with brutal efficiency, much like real soldiers have to. These facts could be easily expanded upon in interesting ways!
Maybe show the internal struggle of our heroic scout dealing with the isolation and morally questionable duties he has to perform to ensure the safety of others. They could also show off his badass Guerilla Warfare tactics in action in a comic! We know from his gameplay he fights with patience, cunning, and to win against such powerful opponents he resorts to downright dirty tactics, that's also a great thing to expand upon if you ask me! Give us some lore describing this underdog Yordle vs the world!
But that's just my opinion, I personally love
and just think he deserves as much lore as the rest of the cast.