1. Get the Latest Post quickly ------------------------------
latest post on the 1st topic page is definitely not enough for the Simple, Fast, Elegant and what's more important Usable forums navigation:
there are quite a few multy-page topics here, to reach the latest post one has to go topic's 1st page -- this both inconvinent for forum regulars tracking such topics and imples redundant load on server.
this can be sorted extermely easy way: just modify default bbPress template a bit so the Latest Discussions and Forums list tables have
* either add another column titled 'Latest Post' containing such link,
* or just turn 'Freshness' column values into clickable links to the latest topic post (with an apropriate :visited style):
it's about 1 (one) copy-pasted (there's no apropriate hook) line of code -- 2 minutes of work.
2. Jump to another forum quickly --------------------------------
bread-crumbs on top of the topic page is definitely not enough for the Simple, Fast, Elegant and what's more important Usable forums navigation:
there are quite a few long topic pages (bbPress paginates topic on every 10 posts by default). so, if one would like to quick jump to another forum they have to scroll up to the top of topic page, then go to forums FrontPage, then scroll down 'Latest Discussions' list to the bottom of page to reach forum list, and only then they're able to select desired forum.
there's also another isuue: sometimes, when people landed to reply the topic from the 'Latest Discussions' list they just don't see which particular forum original topic was filed in (e.x. Ideas) and hence gives strange to OPs replies.
this is also can be sorted very easy: there must be at least a forum selector form, showing current forum name, somewhere just above the Footer: about 5 lines of code -- ~5 minutes of work.
3. Easy markup --------------
having to use HTML markup each time just to emphase, quote, link etc is not exactly a very Simple, Fast and Elegant way to do it.
afaik, there's a plugin which uses A.King's 'Quick Tags', but something which doesn't requires JS i.e. simplified text markup would be even cooler (such as markdown or texy).