Spirit Merger is most interesting of them. Item that lets you to "disable" enemy will be useful against annoying/overfed players.
In my opinion, Open Palm should be an active item. Cool defensive item, but could be unusable in melee builds, since you can't control when you push enemy away. Also cooldown is too low.
Pressure Point is OP. For so tiny price you're able to prevent enemy from escaping. Add on top Superior Duration and Transcendent Cooldown to make it more powerful. It's definitely must be tuned.
These items are really cool. The game totally needs some expansion to melee.