Battlecruisers

[Shizune]

https://en.wikipedia.org/wiki/Battlecruiser

To sum it up, they play their role as they should, their made to be the Battleships younger sibling who in the end has to kill said sibling. Their less costly however have the firepower to knock out bigger ships, as what they were made to do. Logically their also cheaper and can be produced more then just normal battleships/carriers can and require less crew to operate.

PvP wise, its made to kill battleships..nothing else, also this right from the wiki

Battlecruisers are the heaviest ships in the Cruiser class, combining Battleship Primary Turrets with Cruiser performance. These ships are often used as Battleship-killers, since they can sit at range and return fire, while also avoiding damage themselves, and using thrusters to speed away if things turn sour. However, most battlecruisers have slower thrusting speed than other ships in the cruiser class, which exposes them to increased risk from Bombers and other cruisers.