I’ve never felt that shield frequency was that much of a problem, with higher quality components Low frequency will block everything short of a sniper. It would be more interesting if shield frequency was more skewed, like low frequency offering great protection against melee and crossbows while being basically useless against guns and grenades, while high frequency offers great protection against explosives and energy guns while doing nothing against most guns, melee, and crossbow, and medium shields offering great protection against most guns while being useless against everything else. It would also be nice if there was a reason to use modifiers besides high efficiency energy converters, like having circle wave emitter not decrease conversion rate, or having shield capacitors give a bonus effect, like releasing a damaging energy blast centered on the player when the shield breaks.