This is opinion only. Yours may vary.
I'm not much of a PvPer but I have to say, the only canons worth their salt....or at least seem to be the very best are the basic canons and any of the recolors. There is a reason most PvP streamers use the default models.
So my request, Rare, is to make canon cosmetics that look good AND are worth using in PvP....as in on-par with the basic canons.
Some aren't bad tbh honest but those are rare indeed. Yet none can match the fantastic field of view you get with the basics. Some canons have such a large muzzle AND a flared barrel that you literally cannot see the opposing ship unless you are at point blank range. For example, I love the look of the Bombardier Canons, but those are the very worse to use effectively. Same goes for the Gold Hoarders. The best looking canons tend to be the worse ones to actually use.
Since PvP has gotten a lot of love lately, why note design some canons specifically for PvP.
I tested a few models and here are my results, if anyone else is interested.
SoT Canons
S-Tier
Default
Sea Dog
A-Tier
Eternal Freedom
Forsaken Ashes
Barnacled
Merchant Ambassador
B-Tier
Warsmith
Sovereign
Order of Souls
C-Tier
Royal Revenge
Masked Renegade
Hunter
Dragon
D-Tier
Aristocrat
Gold Hoarders
Bombardier
