dont like the yordles, and never did.
why? because they feel like comic relief in a world thats already full of funny, lighthearted and goofy characters.
there is no need for an entire race to counterbalance the super serious rest of the world.
for example: hobbits in lord of the rings fullfill that role, because everyone else is so edgy and emo and grim all the time (dont like them either, but i get the reason for them existing)
league isnt as serious as LotR though, not even close. look at characters like braum, blitz, ivern, yuumi, zoe, twitch, kled, nunu, gragas, rammus, etc.
yes, the lore team has been pushing the story into a far more serious, adult and dramatic direction for a while now, which is very much apreciated, but its still not grimdark enough to justify an entire race of characters that always will have the "goofy and funny" tag attached.
that said: since they will not remove yordles (people love em for some reason), they could absolutely give them depth and drama. they will keep their comedic characteristics anyway, but backgrounds of yordles like poppy, teemo or veigar could easily be changed into something actually captivating. something more than: look at the little ewok, he thinks hes an evil sorcerer, haha.
...god i hate em