It feels awkward for me to keep it formal as usual, but here goes,
LASERS:
I'd love to see some helix-movement or worm-like-movement laser sprites on laser-type weaponry or some sort of energy orb (let's say the energy color is blue) and it incorporates the electric trail of emp lasers but instead of the electricity trailing off it would be pulsating/radiating with electrical particles that won't trail, now I'm not quite sure if this could be pulled of 'cuz I've no idea on how people who create mods do the sprites, and I'm also guessing it'll take a LONG time and a lot of effort if someone wished to do so.
PHYSICAL PROJECTILES:
It's something about those sonic boom effects we see in aircrafts and missiles but instead of sonic boom effects/particles, the light (or background) bends around the projectile (since there's no gas in the void). I'd also like to see some high-impact particles, like instead of the usual bolts-and-sparks splashin' all over the hull, we get to see large, packed, sparks that would reach a few meters upon impact, the higher the velocity of the projectile (except for missiles), the higher longer the sparks would reach.