I like the idea of tilting the guns forward slightly. Personally I'd like them both tilted forward, because I'm a sucker for symmetry, but I wouldn't start throwing things if it became asymmetrical.
Overall I don't think it will make the goldfish a competitive ship. It's actually a fairly large target with low armor, low damage potential and a poor layout for engineers. Competitive ships tend to be ships with high armor (for the buff) and at least a trifecta (junker, spire, galleon, and to a lesser extent the pyra). Even with better gun angles, it's still lacking in damage and survivability.
Although it will make the ship a lot easier in casual play, especially for newer players. I often see them fail to utilize the main gun with a side gun, often relying on one or the other while ignoring the rest. Tilting them forward would emphasize the potential for overlapping arcs, or at least make the ship need least rotation to transition between them.