perhaps maybe we can have a balencing system in place, a mods table values are run through a formula of sorts to calculate the effectiveness of the weapon or ship. if a weapon or ship's overall effectiveness is within a certain tolerance it can be called balenced and is acceptable to use in multi.
perhaps it would be possible to automate the validation process so that modders may make their mods multi compatable without community review. make a check validity flag, which, when run with a mod will go over the data, check whats good, and give the modder a report of what needs to be fixed. if everyone knows the formula then it shouldnt be hard to tweak the mod till its valid.