I think it's not so much a "rushed" feeling as much as it didn't really pack a big punch. Apple Silicon has been touted as the second coming... and their first model is, well, akin to the Volkswagen Rabbit. Where is this Ferrari they've been touting? The machine that is supposed to make the PC world stop and take notice? This isn't it.
They have still yet to sell me on AS... so far it's still just an extension of iOS. Again, it's how this GPU of theirs is going to compete with the likes of AMD and nVidia. Right now, it's best in it's class because it's the only one in it's class. Can't fail there.
They needed their first introduction to be something other than a hybrid iPad offering... to show the world that yes, this CAN be a workstation class chip architecture. Right now, they only prove it works for mobile... which they basically already proved with the iPad.
They really didn't need to do the "One more thing"... because they really didn't have the "One more thing" yet. People would have rather waited for something big than get something that feels more like a refresh. These devices took away just as much as they claim to have given you. Maybe they can't power the same number of ports of the previous generation?
They really didn't get off on the right foot.