I think King of Tokyo is just too light.
7 Wonders was intended as a quick game I think. But it got bloated with expansions and just like Terraforming Mars, people love the game buy the expansions and do not necessarily love the game better with them…
Maybe we ought to have a debate about those as well. Which games really suffered from expansions. Definitely 7 Wonders after the first 2 and Terraforming Mars has more meh ones than ones that genuinely improve the game… and then there is Wingspan Oceania or the Terra Mystica trading thing I own but have never played. Expansions are like movie sequels… and yet I watch all of them.