hyperspace storms look really impressive, and getting caught in one is a pretty bad idea. but i think it's sad that they don't seem to have any effects on battles at all (afaik). you'd think that combat inside a giant space lightning storm would be rather dangerous! i'd like to see such battles have significant environmental hazards that make fighting there risky, enough to make you think twice about attacking an enemy fleet inside a storm, even if the battle itself is rather one-sided.
there could be powerful lightning surges that deal armor/hull damage, shield-piercing emp damage and/or generate large amounts of flux, potentially causing long overloads. there could be moving clouds of [insert hyperspacey stuff] floating around the battlefield, causing rapid CR degradation on any ships caught inside. there could be spatial distortions that suck in nearby ships and spit them out at a random location, maybe with crew casualties as nasty sideeffect. there could be huge magnetic fields that disable fighters or reduce the maximum speed and maneuverability of all ships to a set amount, causing frigates to become vulnerable to larger ships and giving slow civilian ships a chance to escape pursuers.
and if there are more dangerous terrain effects in general, a hullmod like Environmental Shielding that negates or reduces these effects might actually be useful. as it stands, Solar Shielding seems far too situational to be worth the OP.