I haven't seen Yorick as a free week champ in 2 1/2 years or so. It could just be that that one time I wasn't playing League for a week or two Yorick was free week; but I've seen people like Thresh being free every 3 free weeks or so. I'm not sure to get Yorick or not because I've never been able to try him out, so if anyone else agrees that Yorick should be a free week champ a bit more please upvote this thread. :^)
Never Free Week -
Qwertycwer4 votesHe's purposely not in the free week rotations along with Poppy, because of their "toxic" gameplay, and not wanting to encourage more people to play them. After they're reworked, I bet they'll be put back in. As for trying Yorick, you could watch videos of people plying him and see if he looks fun or try to get / use a PBE account to play him for "free."
Kameroonian1 votesI've seen Poppy in free week, not often to be honest, but I've still seen her. In fact I believe she was a free week about a month ago and was constantly being played Poppy jungle. About watching videos to understand Yorick and see his gameplay, I've done that but would like to get a feel of him for myself if you understand what I mean. I haven't tried getting a PBE account yet so I'll look into that. Thanks for the response :^)
Kameroonian1 votesI've seen Poppy in free week, not often to be honest, but I've still seen her. In fact I believe she was a free week about a month ago and was constantly being played Poppy jungle. About watching videos to understand Yorick and see his gameplay, I've done that but would like to get a feel of him for myself if you understand what I mean. I haven't tried getting a PBE account yet so I'll look into that. Thanks for the response :^)
HayRoss1 votes"...along with Poppy, because of their "toxic" gameplay..."
"Toxic" gameplay? What makes these champions more toxic than many other bullshit champions in the game that every hates fighting? What makes them toxic at all? My brother LOVES to play underrated, old, champions that no one plays. He's pretty good at Yorick and Poppy, but he's still very counterable and not overpowered. How are Yorick and Poppy toxic?
Qwertycwer1 votes"...along with Poppy, because of their "toxic" gameplay..."
"Toxic" gameplay? What makes these champions more toxic than many other bullshit champions in the game that every hates fighting? What makes them toxic at all? My brother LOVES to play underrated, old, champions that no one plays. He's pretty good at Yorick and Poppy, but he's still very counterable and not overpowered. How are Yorick and Poppy toxic?
I think it's mainly Poppy's passive and ult, which make her extremely tanky and unfun. I'm pretty sure they're removing both of those abilities in the rework. As for Yorick, his ghouls are difficult to click on and it's unfun to play against. There are probably other reasons, but not that I can think of at the moment.
Kameroonian1 votesYou could just use the A button and easily target ghouls, that's what I do. Really easy Q farm for the doge :^).
DrCyanide1 votesI think it's a bit hypocritical of Riot to say "This champion needs changed so bad we're not putting them in the free rotation, but we won't schedule an update for him".
https://support.riotgames.com/hc/en-us/articles/202294884-Champion-Update-Schedule
Poor Yorick, Skarner gets reworked more times than people can remember, but no one at Riot can seem to make you a priority.
Kameroonian1 votesWent to this site and used "Find" and still couldn't find Yorick.
R.I.P 
~ Forever in our Hearts