I have been hoping for something like the recent new ARP modes for the Take 5 for years. It's a fantastic upgrade.
I would love to see these new arp modes on the Rev2 and Pro3, which I also own.
In the meantime I can use my Take 5 Keys to send Arps to the Rev2, although the T5 keyboard is obviously much smaller.
I also find the implementation of ARP: HOLD-OFF that kills the presently running ARP counter-intuitive, but that's a different conversation and I might be the only person in that boat. I think turning off HOLD shouldn't kill a running ARP if keys are still being held down, because why would I hold keys down that I don't want to sound?