I used the 1024 IR's in the test, because that's what I use in all of my presets...to me, the 1024 IR's still sound and feel better than the stock cab/mics.
My JTV-59 stopped working with the Helix altogether after the 2.10 update, I hoped that 2.11 would help, but, no dice...the tunings are no longer changing, and the Helix acts like it's not recognizing the Variax now.