sera t3 subs have become op?

I don't know if and what changed about them but they now feel unbeatable, maybe i'm wrong but i remember that they used to lose to t2 sub and atlantis mass for mass. i tried now in sandbox and its not even close they shred both t2 and t4. I know sandbox is not the same as in game, but i always had the same feeling in game too. So did really something change about them or is my perception completly wrong?

It was mentioned before on the Discord by a few people. I think the idea was that the effective dps changed somehow even though the stats themselves weren't touched.