Shen: The Ninja who could!
Just a couple of ideas to add clarity to his game-play.
Shen is supposed to be a split pusher who can appear form anywhere into a fight, but a lot of the time is relegated to farming under his turret. If his Vorpal Blade bounced between minions this could help add some meaning to his pushing power.
Shen's ult is great when he is across the map, it becomes awkward when you are near your team during a team fight. You end up standing there waiting to ult in on someone or ignoring your ult altogether.
Added from Stealth Warden: I think for his ult it should be two click like tahm. Activate, shield friendly unit. reactivate within X seconds to start channeling for the teleport. Shield is instant, teleport is delayed.
Discuss below!
Edited post with better idea for Shen's ult.