is Bliss supposed to have such crazy high OP? at 75, it's way above all other frigates. the closest one in vanilla are Hyperion with 65 and Scarab with 60.
Bliss is more expensive than frigate average, but not by a huge amount. the rough amount of OP needed to fill all its weapon slots is also only ~5 above combat frigates like Lasher or Wolf, both of which have 55 OP.
if it needs the OP for balance reasons, i'd say it'd be better to buff some of its base stats a bit and take OP down to 60 or 65. at the moment, getting max flux and max vents on pretty much any loadout seems like a no-brainer, and i still often have enough OP to spare to get several impactful hullmods (and this is without +10% OP from skill).