Things are a bit more complicated since there also time to aim and wind up wind down and not only reload.
On the other hand you still do not calculate Tulips or the fact that FF once vetted can kill a medium with 3 shots instead of 4.
In addition FF is a T3 TD with less tech cost.
In the end of the day do UKF need a stronger TD? It does not seem so since they have great ATG, great hand held AT and many other AT assets.
I mean they have roughly as as many assets as the Axis factions have. Up until recently they didn't even have a snare which is why they got bullied so hard by enemy vehicles.
The painfully slow turret rotation and tank speed makes it incredibly vulnerable. Brits have a great ATG gun but its no pak40 with stun shots, and i often find myself losing to a STUG w/ the vet 1 ability quite often.
Then we move on to fighting OKW, who have a faust on their spammed mainline infantry, and are now known for spamming 3-4 raks in a ground which will destroy a Firefly quickly as it won't have time to run away.. and then the raks just hit retreat and call it a day.
Then we got the HEAT shells from the OKW commander where the JP4 is just having a field day vs british armor.
I don't know.. I share some of these frustrations. I feel the FF performance could remain the same if it wasn't so expensive to field. It's a solid tank, but it is very easily countered. All other dedicated AT are at least fairly fast even without a turret.. but the FF is something to babysit. It's like a jackson almost without the advantages of having the jacksons speed, turret rotation, HVAP or repair crew. I dont find the rockets that great, I'd trade them even tho they are nifty.