I miss the platinum blonde color of the first 2 seasons for Kaley
Yeah, and I miss the general ditziness of early Penny.
It used to be that she provided a contrast being all energetic and oblivious, being kinda high-strung, but now she's just some chick who hangs around their apartment chillin'.
It's gone from social pastiche to just some people hanging out.
It's why Amy Farrah Fowler worked so well. She restored the grating out-of-place'dness.