I don't think I'll ever understand why certain people choose to take ATs as nothing but an insult.
If Sakurai wasn't going to include them anyway, then I'd prefer the next best thing, and that's arguably an AT. Dark Samus and Isabelle being revealed as an AT in Smash 4 was disappointing for me, but the pain would be no different than if they were revealed as standard trophies. This way, the character gets a unique model, possible voice clips, and special attacks — it's a nice tribute to the character. I'd definitely prefer seeing them as that over a stationary model (Plus, all ATs in Smash 4 got a trophy anyway, so it's not you get one or the other).
I just don't see how Bomberman or Shovel Knight being nothing more than a Spirit (or even worse, cut from the game entirely) is somehow more respectful to the character than making them an AT.