Well, what you described as avoiding a hit (moving to the side, etc.) is part of "techniques and strategies", not the I.S. skills. I differentiate between the two. So does Tohei. So do many other arts. As far as I know, the i.s. skills seem to be in just about every imaginable Asian martial-art, BTW. Just as they're part of Tea Ceremony, calligraphy, traditional dances, and so on.
At the same time, many other arts also espouse and practice "moving aside" for exactly the same reasons that Aikido does; it's part of a very ancient concept of no-resistance. I think a lot of westerners have some vague karate-inspired idea that if someone punches you do a wiper-block, etc., but that's actually a caricature. Most arts are more sophisticated than that.
Yes, and I mean it in the same way. If one has no IS skills to deal with the hit then one deploys the tactics to deal with it.
Plenty of folks around can teach the tactic (heck, I can do that) but that IS stuff ... still looking for names.