Looks like it's still Roccat which is good.
The updated Swarm software is definitely welcome, though I had no complaints with the dated-looking original, since it was quick to install, easy to set-and-forget, and doesn't need to be running all the time - which is a huge improvement over the Logitech/Corsair/Razer bloatware that nags you incessantly with promotions, gets updates several times a month, and throws a hissyfit if you deny it internet access.
This is another very expensive mouse though, and it's a shame Turtle Beach aren't making wired, less flashy models. The old Burst Core and Burst Pro are going to offer a damn-near identical experience to this (albeit with a cable) and those cost £15 and £30 respectively over here in the UK, which is a lot less than the £99 MSRP of this Burst II Air. Given that this isn't anything fancy with (perfectly acceptable) 1000Hz polling and pedestrian features, it's difficult to shrug off the cynicism that this would have been a sub-$50 mouse if it was sold by Roccat, and Turtle Beach have just doubled the price because they've put their logo on it.