Sounds great, with that in mind. Shen is my main and having his identity still be there with some more nimbleness for a fight is something im hoping for. I know you guys are probably far along with him but i have had some ideas for him too. Hopefully they're somewhat inline/reasonable.
His W could stay a shield(smaller or larger) just lasting 1 second as if youre anticipating a hit. and upon successful timing ie. shield pops you get an additional shield(small or large) for a few seconds and a refund in energy.
His E could be the same initial _taunt _ but give it like a Renekton treatment(hitting a target allows you to do another dash), except, hitting an initial target or targets(+1 each maybe?) gives you more(tauntless/dmgless) dashes either each taking energy or replacing the current energy refund scale.
Or instead maybe a short stealth 1st parter and the single current dash 2nd parter.
His Q could do what it does now but maybe adds an AoE that grants its life tap effect? And if you hit the target actually marked by Q with Ki Strike it would immediately heal you instead of overtime, for that hit.
or instead divide the damage up through multi part casts so you can mark multiple different targets to help your allies and yourself heal.
And the passive and ult can stay largely the same. Full energy upon ult cast would be cool. I think this makes Shen feel the same and yet more like a ninja.
Anyway, im sure Shen will turn out Fine, great hopefully, but these were some ideas i had come up with for some time now. Take care!