Tryn's Ulti is really tough because when built the right way tryn's damage is just absurd. 500 crits pretty much every .5 secs, even tanks you can chew through pretty easily once your item build is done. Basically the entire challenge of the hero is to get close enough to the opponent long enough, without being disabled, to actually hit him a few times. Then he dies.
At the same time though, when played against alot of hero lineups, if the opponent is half way decent, his ultimate is useless. Mind you if my team hadn't sucked so much... Still though, I'd like to see his ulti a LITTLE harder to shut down. Maybe immune him to slows and fears but not stuns. This would still allow good players to shut down tryn's ulti, but give him just a little more freedom of movement while it's up.
It just seems a bit absurd that he goes immune to death but any disable in the game can still completely neutralize him. I know he has shout, and I know he has SS, but alot of the time, especially in 5v5, it's just no help.
Anyway, I think he'd be a lot stronger if I was playing with better team mates. Seems to me if you have people that understand all you need to do is buy tryn a few seconds and half their team is dead, things would go smoother. Also, he's crazy good at farming after about level 9 or 10, and also can kill most if not all heroes 1v1 after about level 12, and is a great anti carry late game. Soooooo maybe his ulti is fine? =)