So what is the current meta with regards to weapons? I always pick missiles and lasers because they seem to be the most practical in the real world sense.
Current meta?
1. Best weapons are Kinetic Artillery + Plasma Cannons. KA hit from extreme range, PC negates armor - and both hit nearly instantly, just like X weapons
2. Missiles are useless because of huge overkill, slow movement speed and extreme vulnerability to point defense (non-swarms). No strong points, really, all advantages are purely theoretical and are negated in first seconds in battle.
3. Strikecrafts cannot replenish in battle and need time to engage enemy - are just as useless as missiles.
4. Rotary autocannons have their niche on destroyers in anti-corvette job
5. Energetic torps have some use on corvettes, mainly vs Awaken Empires.
6. Lasers are outclassed by plasma and kinetics, but are still infinitely stronger then missiles
7. All X weapons have similar effectiveness, and are good in general - but fleet based on CC is stronger then fleet based on BB.
The larger battle is, the more advantageous long-range fast-hitting weapons are. Missiles slow speed makes them terrible alpha strike weapon (range advantage is completely negated by travel speed), and slow speed combined with inability to retarget makes them vulnerable to overkill issue at insane level. On top of that even small amount of PD may easily negate Your entire missile arsenal (SWARMs are invulnerable to PD, but have worse range and same problem with overkill, keeping them as useless as other missiles).
Strikecrafs have similar issues with slow speed and long engagement time, while theoretical advantage of no overkill problem is negated by inability to replenish in-battle. Don't put in on your ships, just like missiles.