Dang, I totally disagree about the CGI. I think it's been pretty great. I don't know, maybe it's because I grew up on cheesy 80s/90s special effects, but I think what they're doing today with cinema is incredible. As far as the flying baby, yeah it was goofy, but that’s literally IT’s whole vibe. Pennywise always does bizarre, unsettling, borderline-absurd stuff to mess with people’s heads. He feeds off fear, so the weirdness is part of the buildup.
I get that it has been a bit of a slow burn, but it's just building up the story. I enjoyed last night's episode of Pennywise's origin, the reason he is bound to Derry, and why/what the military might be interested in doing now.