The pilot is terrible and like a shot for shot remake of a UK episode. The best guide for those early episode was how thinned out Carrell’s hair is. The less they tried to make him look like he was balding the better he got. Also, fleshing out the side characters helped a great deal. Kelly Kapore registers completely different early on. The best thing about the first season is it’s only like 6 episodes long and they seem to have figured things out tone wise in the final couple episodes.
The same can be said for P&R first season too. They initially made Leslie Knope a Michael Scott clone, a socially inept buffoon type character but quickly allowed Poehler to flesh out the character and turn her into a Type-A altruistic public servant.
I think the improvised nature of these shows really allowed them to develop into highly watchable very funny television shows but allowing that to develop takes time.