I agree. TT's gimmick has been the most enjoyable (and creative) for me as well. I liked the whole idea of being able to play as "the dark side" of skylanders, which was well built imo.
SF gimmick never appealed to me tbh.
It was a good idea with trap team but they should take it a bit further. Instead of reposes a ton, take villains that worked as traps villains and make them actual figures and putting them on the portal reverses the mechanics of a level. Instead of defending a place, you attack it instead. Different missions depending on skylanders or villains. That would be a way to revitalize the franchise and play a darker side.