Really? I was not aware... has it had any specific traits linked to it? or just a weapon model/projectile?
As far as I am aware, the weapon was intended in it's prototype to be a similar weapon to the flamer.
A particle weapon, with quite short range, high fire rate, large clip size, and mediocre amount of shatter damage per shot. So it is pretty good at destroying mechanical components as you'd expect from electric weapons - little to none damage to armor, balloon and hull(as they are not vulnerable to electricity) and the bulk of the damage dealt to components.
Now that is what I believe was intended of the tesla gun in it's prototype state, minor tweaks have probably happen since then and it'll look a bit different mechanics-wise.
Keep in mind that muse specifically said that we cannot expect anymore new weapons/maps/ships in skirmish mode until coop comes out, so this gun is most likely - if released, to be released in coop and then later on if found to be balanced enough be put in skirmish.
So don't get your hopes up.