Maybe you don't understand that you don't have to fly around with all DHC's in an escort. Nothing stops players from geting a mixture of DHC's and Cannons. Cannons have a 90 degree arcs and fire faster with rapid fire BOFF powers than its DHC counterparts. With Rapid Cannon Fire 2 and 3 have a longer sustaining rate of fire than ther RCF 1. The same goes for Rapid Cannon Volley Boff powers. I have flown escorts before because I have a Chirmira and I have a Klingon character with escorts and battlecruisers. Maybe you need to go back and look at how to build an escort. With cannons mixed with DHC's I can fly around in circles and deal alot of damage.
Do you realized that targeting subsystes don't do as well unless flying a science ship and you have to have your skill tree set up with high system decompiler for that to be effective? If you are in a cruiser or anthing else you risk sacrificing DPS or skills that help you tank.
Cannons with 90 degree firing arcs ? How interesting. lol
I am sure you are refering to single cannons which have a 180 degree firing arc... and do little more dmg then a turret.
Escorts running single cannons aren't going to kill anyone... well unless they are shooting at terrible players anyway.
Sorry DHC are the only real option on an escort.
As far as target sub systems go... I can see now why your build has issues with escorts. You are obviously building to win by simply not dying... last I checked the only way to win any fight in this game was to kill the other person. Simply not dying is NOT an option. If you have not planned your build to be capable of Winning... why would you expect to. If you just want to RP it up and chain EPTS throw some RSPs and pop some coloured beams of have at it... its fun to pretend where flying the enterprise at times.
However if you want to WIN fights in this Video Game... you best have a plan of attack. Is there opportunity cost in slotting OFFENSIVE skills.... ahh ya. Why is that a shock. YES I am suggesting you don't run 2 copies of Tac Team on your cruiser... trust me you will be just fine with 1... and if you time a sub system target even a level 1 properly it can turn a battle for you. NO its not an IWIN button haha you can't move I kill you now... however IT will be as effective as you choose to make it. As far as specing Decomp goes... haha you don't need points in Decomp to make sub systems useful... and if you want to spec some points in to decomp go for it... what are you going to loose ... wait hold on I'll use my mind reading powers to scry out your tier 5 point spend.... Hmmm 9 points in Kinetic armour.
Ok I'm sorry my tone can be harsh at times and I don't mean it to be... honestly though if you build 100% defense its no shock that you can't do anything about the escort on your tail. Sometimes the best defense is a good offense or so I hear.
When the messenger comes to appropriate your profits ... kill the messenger.