I don't want to rant and complain about the mechanic. I just thought I would post this for the heck of it and see how people feel.
Consider that your pirate holds both the EoR and the Blunder with 2 hands to fire. Now consider that the Pistol is only held in one hand. My adjustment would be thus...
Since each takes two hands to operate, your pirate may only have either the EoR or the Blunder on at any one time. The other weapon must be either the Pistol or the Sword (since both only require one hand to wield). If you are using both the Pistol and EoR/Blunder, then they share the same 5 bullet pouch. This would still allow for PVPers who wish to double-gun to do so, but with a slightly higher difficulty maintaining their reloading as now you only have 2 "double shots" before you must reload your pouch. If you opt to Sword/Gun (any), then no major changes.
I also had one other idea, not sure how this would play out really but... If you equip a pistol in both slots, now your pirate just wields both pistols at once. One in each hand. You can press M1 to fire one, then the other in rapid succession from the hip-fire position or hold M2 to aim one, fire, then aim the other, and fire (so like maybe a half or whole second delay between each fire to aim?). If you shoot only one pistol and don't follow-up with a second shot, your pirate reloads as normal. If you shoot both in succession, the reload time is longer.
Those would be my thoughts and suggestions on addressing the double-gunning complaints I read about a lot. Thoughts? Furious Replies? Let me have 'em. :)