Shen's Q should let him teledash to his sword
You should make Shen's sword randomly spawn in the area around Shen every several seconds and let him teledash to it with the same buff he has on live.
If Shen teledashes through a champion, they would get the same debuff they receive when his sword passes through them on live.
I believe having a semi-reusable situational teleport makes a lot more sense for Shen's character and is more in line with his lore.