Riot, please, for the love of all that is holy...
Revert the nerfs on Shen's passive shield duration. It's hurt his jungling, it's hurt his laning, and it essentially increased the CD of the shield because it lasts for less but the overall CD is the same.
He already has mediocre natural MR, the worst armor scaling, horrible HP scaling, and no stats that really boast that he's a tank. Hell, you're FORCED to build tank because anything else will render you blown up in fights. I'm fine with that if you just give us SOMETHING. His shield was supposed to be what made him tanky.
I feel like this is vorpal blade all over again. Shen has one good thing and you nerf it over and over because his ultimate happened to be the flavor of the month for pros. Hell, even if you didn't nerf Shen I bet he would've have even been seen at Worlds with all the top lane bullshit anyway. Vorpal blade used to give some pretty good healing, until you eventually nerfed it to single digit numbers. He used to heal for a whopping 1 HP over 3 seconds at rank 1 of vorpal blade. How useful.
Grudges aside, all of us who main Shen want one thing: to be TANKY. I would give up that %HP damage on his Q just for a chance to be tanky as Shen. When I am forced to take scaling armor runes just to have the same armor as the lower-end tier of mages I don't feel like I'm playing somebody who is supposed to be tanky, and especially someone who's strongest against AD auto attackers.
End rant.