The animation is good and the voice acting across the board is very good. Fair enough, for we get more episodes for the effort. The creative team also likely felt it had to compensate for characterization by simply adding more aliens and giving the management and staff of Area Fifty-something more of a role. It's supposed to be fun, and the slapstick is at times inspired, while every so often genuine wit still manages to surface (for example, an interesting take on educational television).
But that's the price one pays for 'media compression,' especially when hyperkinetic slapstick is emphasized within mere minutes if not seconds per episode. Agreed, the inner Susan could be FAR better explored though the pilot episode does kinda-sorta explain her now-willfully variable ginormity. though it took a friend who knew I'd enjoyed the source film to point this series out to me.