I laughed when Arbuckle got his new job. My assumption is that he will be shown up as a fraud at his new location. But time will tell.
Air raid? In its pure form it is still a good option for a team that has certain limitations. It is never going to win a natty, but it can deliver a minor bowl regularly. With no tight end, scholies can be reserved for 5 OL each year. Three (center and guards) can be slow but have to be the Leach 6'6", 300+ model. Any (literally any) P4 team can build that group, and most G5 could do so. Air raid QB's can be found. Are there limitations to the pure air raid? Sure! But when applied properly it will have some success.
Air raid hybrids? Now you are back to having to have a top 25-30% OC to make it work, and none of them look exactly alike.
Fun debate: is the run & shoot an air raid hybrid? I'd call it visually the closest to the air raid of the hybrids that I've seen. No TE. Lots of quick passes. But the passing routes are fundamentally different...
I loved Observer's rump turn option comment. Walden's veer worked pretty well for us, just like Leach's air raid worked pretty well for us, because the scheme and players were not a commodity. They were sufficiently different to enable us to differentiate ourselves...during recruiting, while scheming and on the field. The triple option is another offense that is differentiatable...but it has to be run properly. Its failure at OSU during the same time period that Walden's veer was relatively effective shows that coaching matters. Air Force has had some good seasons with the option, and Oklahoma won a natty with it (that success being what sent Aikman to UCLA). So it can work.
All the above to say that any system, properly coached, can be effective. At WSU there is definite benefit if it is not the same system that everyone else is running.
Personally, I'm suspecting that someone will resurrect an offense where the QB is under center 75%+ of the time. Using a FB/H back. The FB/H Back will do some of the traditional block and dive, sure, but in my speculative O the FB/H Back will also be a pass catcher over the middle and, coming from the H Back position, a middle screen blocker. Why do I like that? Because so few use a FB anymore, and so good ones are available to recruit. A program that used them would have no trouble getting some good ones. The main reason QB's have moved away from under center is to give them more time to check off receivers. But with a legit fullback threat the DL can't rush the QB full out. Add in a good halfback and some version of a modified I formation or pistol or even (ghost of Walden) veer option could be run. Long story short, any O can work. A differentiable O will be good for WSU. But it has to be a good coach, regardless of system.