Still not a fan of Rose getting into romance via drunken saunter. I can't be the only person who feels this is a bad idea?
Only reason Roxy got away with basically this was due to her personality not being pre-established as sorta contrary to this?
I don't disagree, but I would beg to differ. Rose's personality long since pre-established was that she dives head-first into terrible decisions with complete confidence that she's smart enough to sidestep the likely consequences. (Everywhere except interacting with people that is.) She's wrong as often as not of course, and that makes it dramatic behavior.
The alcohol is a minor issue (see what I did there) and Hussie laid the groundwork for it in the year 1 intermission, with her talking about booze being an acquired taste. Sometime in the past year, maybe she went stircrazy enough to try drinking. Since she's still smart as a whip even when smashed it's easy to see how her normal reckless confidence in every aspect of life except interpersonal communication could lead her to doing particularly silly things there.
Anyway, yeah somebody is going to fall down those stairs. Luckily, breaking your neck in a drunk pratfall is likely neither Heroic nor Just enough to stick, and Kanaya's already dead. I'm betting Gamzee gets so excited that he falls out of the vent and down the stairs, and Kanaya and Rose don't even notice.