The crux of this is really what kind of writer are you? Are you a minimalist, a maximalist? A sandbox-oriented fellow or narrow linear-oriented one? 

Advanced Roleplaying should focus on developing interesting and complex characters that become part of plot-lines which catch the imagination and inspire the writer behind them to exercise creativity. It is mature, humorous, imaginative, tragic, terrifying, passionate, and rife with descriptive language and characters with real personality and relatable cares. Quality posting is far better than needless novels, yet one should never neglect detail when one feels the need. However, while word and paragraph requirements ought to be unnecessary, single paragraphs cannot contain enough detail to suffice.

I'd like to point out that advanced wasn't started as a section to judge by word count alone--it was a place to hold larger lore codexes (see: extensive settings) and a different style of pace. I've read a few older advanced RPs through waybackmachine and they aren't very different from your high casual markup. At this point in 2019, all the sections serve only as "audiences" rather than length or detail. What kind of audience are you appealing to for your RP? Things like that.