These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Crowning Moment Of Awesome: The group winning number one on Show Champion with "Mamma Mia", especially after all the crap they've been through in the last little while. It's heartwarming as well when you see Hara and Gyuri making open efforts to be friendly with Young Ji.
Ear Worm: Most of their songs after Sunghee left the group and Hara and Jiyoung joined. Special mention goes to Mister, Wanna, Step and Lupin.
Wanna is such an Ear Worm that Pump It Up Fiesta, which includes the song (among other K-pop songs), has a course that consists of the song five times in a row.
Nicole's getting hate now because she's gone back to America to study, and never seems to be doing any actual studying. Netizens are resentful, saying she's quite average-looking, she "probably would have ended up working at a McDonald's in America", "she's not a celebrity anymore so stop writing articles about her"... Sheesh. It got even worse when it was revealed that she would be having a solo debut in America.
The new member YoungJi seems to be averting this so far, although there has definitely notbeen awarm welcome.
Tastes Like Diabetes: Honey, as the name would imply. It's more the concept than the actual song though.
Of course this is about the most subjective trope the tech demo evokes. Some people praise it for finally overcoming said valley, since Kara very closely resembles her voice actor and a real human in general (you can see the muscles move under her skin and her nostrils flare as she speaks). Other find that she still isn't human enough.