I think it feels abrupt mostly because their "relationship" has always been based on physical attraction, and I never felt like they really wanted to know more about each other. They just keep making false assumptions about each other and trying to prove the other wrong. It's kind of weird.

And it's not sudden. I think there was already hints in season 1 of him being pissed off at Laurel for similar reasons.

For me, both the images and the sound are awful. And they don't even go well together, and the whole feels like amateur montage.

I think everybody would end up dead drunk before the end of an episode. Then again, maybe that's what the writers do before they search for new ways for everybody to have their memories erased. We should add it to the list.
"Somebody loses their memory" Drink once.
"The whole town loses their memory" Bottom's up.

I think it has more to do on the lines of : "Once you become a love interest, you lose all interest".
See also Charming, Belle, Hook.

All those trips in the Enchanted forest and Neverland and Emma never was once without her eyeliner. But now she's lost it, so I guess she must be really evil and tormented.

I actually haven't been able to completely watch those opening credits yet. I find them so ridiculous I always skip them, go in another room or look at my phone.

There's already one. http://www.drinkiwiki.com/O…
It appears to have been done some time ago, but you could always update it.

Bella isn't in distress because she's surrounded by superheroes. She's in distress because she doesn't have a brain. Or a personality. Or an extensive vocabulary.

No they're not. Recitatives are sung, but are different from arias because their rythm is free, dictated by the rythm of the text, usually only accompanied by a portion of the orchestra.
Les Parapluies isn't an opera, but Die Zauberflöte is. Wether there are spoken words or not is not relevant, what is relevant is the…