I love how there's this massive discussion about what's unreasonable in a scenario that doesn't even exist in our reality
Explosions are cool. We hear them in space because it's a game, and without sound effects, the immersion of you being in a grand battle is lost as we're so used to hearing things explode around us when we're in a grand battle in any other game
Or consequently, swords clashing, era depending
Now back to how crazy this battle is. Technically impressive, but that video did terribly to deliver (to me anyhow) the awesome level of the battle. I saw a whole bunch of ships, some lasers, but generally just solid beams. No crazy dogfights, ships flying around killing eachother... just everyone shooting as this massive ship in relatively fixed positions
...or getting shot by, not entirely sure. Fixed beams are hard to tell where they're coming from when you didn't see them shoot originally