Sure - BBT has a big audience for a sitcom.
Problem is - this show is not even remotely the same type of show. BBT is a 3 camera comedy sitcom shot on a stage with a live audience.
YS is a single camera (what looks like) Dramedy shot on soundstages and locations.
It's like comparing Seinfeld to The West Wing.
I'm absolutely sure that the BBT audience will tune in at the start - but this looks like a very different beast - so I am not sure long term success is Built-in.