Hextech Skin (and a few other ideas)
You gave a Hextech skin to Poppy which is not a bad thing. But upon reading the description for it under the Collection tab she gets called an engineer which just doesn't make sense that you gave her this skin and put that in the description over another Yordle that actually IS an engineer/inventor and would be one to "feverishly researches the ultimate scientific breakthrough - the creation of an artificial soul." good old Professor Cecil B. Heimerdinger. And Heimerdinger just seems like he would create things like some of the Hextech Champions that are creations (especially Kog'maw, Sion and Renekton). So you should consider giving Heimerdinger a Hextech skin before any other champion.
Also for another skin idea Illaoi needs another skin she has been out for awhile and you only just recently gave her the two skins she has (while Zoe , Xayah and Rakan all released 2 years or more after Illaoi, all have more skins). Possibly a good idea for her would to try and design an Elderwood skin for her if you can (not sure what her totem would/could be turned into but the tentacles could be vines), or a Dragon skin (the totem she carries could be a Dragon head with the tentacles made to look like dragon tails instead).
Also consider giving Ziggs an Omega Squad skin, he would be the demolitionist for the group.