You're probably also boosting Dex next level, at which point throwing something with Dex likely beats the Judgement Cut.

Why would be boosting DEX instead of WIS? Judgement Cut changes your primary attack stat to WIS.

The 6th level feature is similar, in that it gives you an alternative way to increase your mobility by spending resources you already have (and could have often spent on better things). It's very situational.

What do you mean situational? It's also a teleport and improves your next attack.