Tactical Lasers plus hullmods are viable PD, and it is not a trap option. It has trouble stopping looping Salamanders, but it is great at long-range interception, and it has passthough, which no other PD features. It is not perfect, but no beam PD is (all have terrible stopping power due to low DPS, unlike IR Pulse Laser or ballistics). The only perfect PD weapon is dual flak. Even Vulcans are better PD than beams.
As for PD boat, beams are terrible unless you have a bunch of ships to zap things in a crossfire. If you want a dedicated PD boat, get something with dual flak. The role of dedicated PD boat is completely unnecessary. Most ships have enough mounts to get some viable PD, and it that is not enough for some ships, more ships supporting each other should help.