As of the current 'dev' build (soon to migrate to 'stable') energy torpedoes are now in the game.
Right now, energy torpedoes have the following combination of traits:
1) They can be intercepted by point defense.
2) They don't use munitions.
3) They do have firing arc restrictions.
4) They don't persist over multiple turns -- thus, like direct fire weapons, they effectively have a limited range.
The intended niche of energy torpedoes is to give you a knife range weapon that's a bit stronger than beam weapons, but, can be countered by automated point defense.
There's a real problem with the core balance right now, however, as standard torpedoes are already fulfilling that niche quite nicely. In the not too distant future, (non-energy) torpedoes will probably get a nerf that makes them far less effective against fast moving targets (i.e., destroyers and light cruisers).