Of no, of course not. The closest I'll be going with hyperspace missiles are Devastator 1/2s, the D1 being slightly more powerful than your standard nuclear WMD with a sublight drive attached, and the D2 being significantly more powerful with a sublight drive attached. 

Obviously expensive, but they'd only be present on Dreadnoughts or Missile Cruisers. The majority of missiles will just be nuclear or Shrike (which are kind of like HEAT shells from a 76mm barreled tank as opposed to HE shells from a 150mm barreled tank- like HEAT from a Sherman tank as opposed to HE from a KV-2)

Cirrus-class ships are meant for espoinage and striking critical enemies- such as finding the weakness of the flagship, and then shooting that at an angle to try and hit where the reactors should be, because no reactors, equals no ship, really. 

They'd be the one who finds out your fleet before I find out mine. Could there be like a special ability? Where if I send a Cirrus first, I can pick where I come out in relation to the enemy fleet, at a purposely advantageous position, because they can do that and still surprise them?

But multiple barrels would also be difficult. The barrel has to hold against extreme heat- like really extreme, from void-cold to vaporize-a-diamond in a couple seconds. The redundancy would obviously be useful, but that means the barrel isn't as firmly connected to the ship, which means there's more room of it messing up and malfunctioning, and tearing itself apart. 

But the laser itself is really just a big hunk of electronics, lightly covered/armored with some really big cables connected to the reactor and batteries. Replacing the laser itself- perhaps each shot is so powerful that it actually fries the device- would be much more likely.