I haven't got access to a tier 2 Industrial Fabricator atm so I can only presume that the only quad cannons that exist in game are the disruptor and phasers from the c-store ships, if so could we please have advanced and elite versions too?
A really like the look of the quad phasers on my Defiant but you have to add other types to the ship which makes it look like a mishmash of effects, a solution could either be as requested many times before change the effects so that its either a console or if you have the quads equipped all frontal cannons are quad.
Alternatively my suggestion is allow those that have unlocked the quads in from the c-store to purchase advanced and elite versions, but allow all 3 to be equipped at the same time or Advanced/Elite versions can purchased for a higher dillithium (plus unlock by having the c-store purchase of the refits) i.e. 3x Advanced Quad Phaser Cannons, plus a torpedo on the ships forward weapons.
This should also encourage sales of the Tactical Escort and Norgh Bird-of-Prey Refits giving a good reason for Cryptic to do so, plus a good reason for fleets to look forward to having the tier 2 and tier 5 Industrial Fabricator projects completed.
So go on Cryptic Studios make us proud to see our quads phasers and disruptors firing without other types showing at the same time
An alternative is to allow a duty assignment or crafting option to change them from say Phaser to Polaron. This way you still need to spend the money to get them (C-Store ships), but you can have all types by just spending some resources to convert/change them.
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