I love the sonic mines and use them most of the time in GW and GW2. I love how useful it is to defend a point or teleporter area, and of course the sounds it and the regular sonic grenades make are excellent. The mines have an arm time so they can't be used to immediately stun the plants, so you can get away from them before they're ready and of course you can place a few of them as opposed to the single grenade that does detonate immediately to balance them out.
Bullhorn swarm is yet another reason that I dislike engineer in BfN. It's another BfN ability that doesn't seem like it's working correctly with how it behaves. The way they track the plants means you can get chain stunned by the same swarm which is not a fun experience and they track extremely far. This is another case where they should have kept what we had and adjusted for balance as needed.
