Improve Shen Ult

As an example, when Lucien was released, his Lightslinger was hitting two targets when one dies, which was a bug, which Riot decided to embrace.

With Shen, when his ult keeps bugging so he doesn't teleport, the response is "No! Shen must teleport with Stand United unless the enemy prevents it exclusively!" Why wasn't this bug embraced?

Yes, it's frustrating to want to shadow dash as soon as you ult in, but dash too soon and critically fail, but it's also frustrating to ult your adc in battle, and then have the enemy escape by walking right past you while you can't move and then teleport away from the enemy.

I feel that allowing Shen to cancel his ult, gives him a higher skill cap, where a skilled player has to wait until the moment he's actually completed ulting before activating skills, as opposed to just spamming abilities until your ult completes and you're guaranteed of using them in the first moment. Having more freedom of movement could slightly raise Shen's power, without raising his attack power--or any of his numbers--and without making him more directly hazardous in combat.

Discussion?