Like other British destroyers, she retains the ability to single-launch her torpedoes but, additionally, her torpedo launchers reload sequentially — one after another, coupled with their fast reload in general. This will mean Barfleur will almost always have some torpedoes ready, but it will take quite a while to reload her full 10 tubes
The Almost Always some torpedos ready text may mislead people and they may think they can send out 1 torpedi every 10 seconds. In reality it is not so, and it has an average torpedo readiness, typical.
So it has 2 x 5 torps. When other ships reload both torpedo racks in ca 1-2 minutes then the new DD reloads only 1 rack at a time and when it gets done it starts to reload the other rack resulting in total the same total time to get 10 torps ready as for other ships. Just that you can use the 5 torps already while the other 5 are reloading, in other DDs you must wait all 10 torps to be ready to use. So, in a way it gives a bit quicker access to torps. In total time there is no difference. No advantages really.
You get 5 torps by ca 50 seconds, similar to the T9 DD Velos.
An example scenario is such that you wait 100 secs and shoot 10 torps, then wait 50 secs and shoot 5 torps, then wait 50 secs and shoot 5 more. In other DDs you also wait 100 secs and shoot 10 but after that you can't shoot any torps in 50 seconds because you must wait 100 seconds to shoot 10 again. So, in a way you have more readiness with torps, like in every 50 secs you have readiness, but just 5 torps only.
The guns are only in forward, so when disengaging you can't really shoot, similar to Pampa and Hilder.
The smoke is very long, 30 seconds, like american smoke, so you can smoke a very large area. But it is useless usually.
Manuverability is good, torps can be shooted 1 by 1 that can make Kamikaze attacks good of course.
Slow torps, ca 62km/h.
I would compare the ship mainly with T9 DD Velos who has the similar 50 seconds torps readiness. I wouldn't compare with UK DDs really because Uk short smoke makes them too different, that smoke is the main feature in DD hunting.
In general TechTree Uk DDs are more competitive than that new DD. But the new DD is still an average ship, not bad one. For an agressive skillful scout like me such ship does finely. Compared to DD Shima line ships it does the same quality scouting, smoke+5.6km does always on any ship. But the torpedo power is clearly weaker than Shimas have, a little bit compensates the 1 by 1 torpedo shooting, so the lucky punch can devastate as well as Shima lines typical torpedo spread. But good luck getting such hits.
60km/h torps speed requires lot of luck, in Randomz you get such luck a lot, in Rankedz/Clanz not so much.
But if your team can aim guns then a good scout is all they need to win. And such ship does it finely. You may say it scouts better than T9 Jager because it has smoke. But not better than Shimas, Velos, etc, they all do the same.