I agree with you in the thought that Atomic might be a bigger problem than Drain Fafnir. I've been thinking about that for a while now.
That being said, while this winning combos list doesn't represent it, I have found certain opposite spin Hold-based set ups to be able to defeat Atomic-based combos. I know you lost with bR on Hold versus 1234beyblade in the finals, but I have found aC.2C.H to be pretty consistent against dF.4G.At. I used it once today against Jesse and lost because he chose NSZ absolutely out of nowhere lol, but I was planning to use it in the finals of the tournament. I ended up not needing to however because I knew you would be using Atomic on Blaze Ragnaruk after doing so well with it in the group stage (so I had dF on Hold in my deck instead, in case aC.2C.At didn't work out, but it did), and I knew Jesse didn't have Atomic at all.
Overall, while I am legitimately concerned about Atomic, I came away from this tournament feeling a lot better about the metagame than our last event (which 1234beyblade will hopefully get the winning combos for posted soon) which was primarily a dF.4G.At party. This time, dF.4G.At did not feel quite as dominant.
But yeah, definitely appropriate to wait and see how it plays out. I think too many people jump on the "let's ban it" bandwagon as soon as something new and good gets released. Even if we know something to be potentially overpowered, it will absolutely never be a good idea to make rash decisions like banning something just over a month after it's been released. It deserves to be played out in the competitive scene for some time–especially with new releases coming out every month–before anybody even seriously thinks about taking an action like that.
I for one am enjoying the changes the metagame has gone through over the past few months and am excited to continue testing and figuring out how I should be playing the game in its current state. Instead of lamenting parts like Atomic and Drain Fafnir that may or may not be overpowered, I'd rather take the time now to try and find ways to defeat them before considering any further action.
And I mean, today I almost lost against Spryzen Boost Variable with my dF.4G.At (and against Naru Blader's dF on Revolve, SBV
won!), so you never know what's out there haha.