Got a turrent on my first ship, switched it out for my torpedo launcher so I have 2 single phaser arrays fore and the turret aft.
So far its great, I realise the power is lower but whether i'm facing the enemy or side-on i can continously fire all of my weapons (from behind i'm boned but i dont worry about that as it never happens)
My question is are turrets worth it later on? low damage but impressive rate of fire and arcs compared to thinner arcs and more power but having to become more manouverable.
it greatly depends on your style of play and what your flying. with klingon carriers imho i'd say its a must have since your turn rate as about the same as a super oil tanker. have used them on rear slots on escorts to great effect. cruisers and sci vessels are a mixed bag based on boff skill layout.
Turrets are the only weapons you can put in the rear slots that can fire forward, maximizing your alpha and frontal damage potential, which also goes hand in hand with using torpedo launchers in front, but the maximal damage for a slower ship is most often in the broadside, which is better served by single beams.
It depends mostly on your ship and what you [character] can do with it really.
My play style is tactical officer, i usually am the first to rush in guns blazing so - so far its been very useful being able to fire 2 beams and a turret, then i'll turn sideways which with all my arcs can still fire to full potential from the port or starboard.
its just if i get taken from behind lol, thats when i'm boned - as all i have is the turret. but rarely do i get in that position unless im overwhelmed.
but i suppose an escort or smaller, speedier fighter might be more useful with turrets.