You have a million characters, I don't know what you're ever up to!
I'm guessing it's probably amazing with Wizard freeze builds, but if you're playing with any other class it winds up being kind of annoying? At at first glance this strikes me of more of a solo thing.
I actually like it better in groups (at least it is way easier). It'd probably work really well with a CM wiz + cyclone monk since everything is concentrated and you'd be able to stay max disc the entire time.
The biggest thing that is annoying with this build is fighting enemies that run away since the grenades are directional. If CM wiz and monk concentrate stuff into an area you can just stand behind them and turret bubble them for extra eHP then keep dropping mines and sustained DPS.
It's too fucking bad that caltrops don't do any type of group buff..
The main problem with DH is the effective DPS isn't great. I'm not sure what I'm putting out but I have 220k sheet dps with my DH now and I'm not convinced that I'm doing more damage than a 130-140k dps monk or something.
Also, nothing really annoying about the build. Bubble turrets help everyone and can kill trash that you leave behind. Grenades don't have knockback so it isn't interfering with anyone's stuff.