Yeah that's the kinda response I get from my friends and family. Seth is so heavily associated to FG. Which I'm a huge fan of. So I think some were expecting a show in a similar tone. Like you said, similar to FG. I think that's Fox's fault though. Their promotion was a bit innocuous. Marketing team fail I think.I like it. Want to see where it goes as the writers get more comfortable with it.
I do see a problem though. A friend of mine who is a Family Guy fan watched and was disappointed it wasn't more of a comedy. Viewers tuning in may be expecting a tone similar to his previous work.