The Karuna is one of the most tactically flexible Warships I've seen in FS. Incredible range with it's main damage dealers, the Railguns aren't too shabby (plus, we're no strangers to having to have your ship face the target to brings most of its guns to bear,) decent armor, speed, and the ability to carry strike craft. I saw a lot of people wanting to play a capship mission as the GTVA, but I honestly wonder how many of them realize how hard it would be due to how one sided GTVA capship combat really is. If the enemy does something unexpected and gets out of range or your main firing arc, you dont have a lot of options. UEF capships, and especially Karunas, do.
Offtopic, but I keep forgetting to ask, does the Solaris-class have any heavy anti-capital firepower besides Apoc-Spam? I read in the tech entry about turreted Railguns for anti-subsystem, but I never saw them in action, and I may actually be misremembering that tech entry.