Isn't Arsenal just a tool, like CamRanger, and other similar remote controls are tools? Isn't the AF-on button also a tool? Is it okay to use a wireless remote to trip the shutter, and perhaps do some focus stacking? Then not okay to use it to alter the exposure?
I can recall the loud cries when auto focus came along. It was going to kill creativity. If the shooter couldn't get his subject in focus in time to capture the shot then the shooter just wasn't good enough, and all other manner of derogatory claims toward AF photography.
My point is that creativity is the very absence of strict rules. New technology allows new tools which in turn allows new creativity. Back in the film days we didn't have cameras that had the controls found in a modern DSLR, yet making images was still called photography when using film. Todays digital cameras, coupled with software, can create images not possible on film. I'd bet the farm that Arsenal, and it's ilk, are not going to do any harm to photography, and in fact they may turn out to be a solid advancement in the art, much like AF, etc.