Riot, You could take a lesson from your Aatrox changes

And apply them to Tryn. Make his ult much more about using it during an all in to gain buffs and then, IF he gets a kill he could gain "undying rage" which keeps him alive at 30/50/70 hit points for X seconds. Cut his early passive crit % and give him increased crit damage/attack speed/etc when he ults. This would promote tryn using his ult offensively, and less of saving it for "im about to die, here is a 5 second pass." It would also make it easier to punish a losing tryn in the mid game. Atm, if you play tryn and you dont win lane, you can still just scale because there is 0 way for the enemy to dive you. They would have to fight you under turret for a minimum of 5 seconds, which is impossible.

Just a thought because Tryn, while not a top notch champ, has not been fun to lane against for years now