I've been searchig for a forum or discussion platform that I can use on my website. Misago looks good, as a modern replacement for tradition forums, like phpBB, vBulletin, etc.
However, in terms of the default UI, the same mistakes that the folks at nodebb.org and discourse.org made are also evident here; wasting too much space for displaying information.
Take, for example, the home page. The main content area looks fine, but the sidebar does not seem to have a width limit. At least in looking through the css, I did not see a width definition for index-popular-threads class.
Typically, sidebars tend to have a width no less than 300px. I said "no less" because that's the minimum width for a standard IAB display ad that most publishers in a sidebar.
The fix for this is easy: Just give the sidebar a suitable width, so that it will look, size-wise, a bit more standard, and the contents in it, a little bit more organized.
For the thread list and topic pages, a lot of white space is wasted. Those pages are where a sidebar will be of most use, both to visitors and site owner. I'm saying this fro mthe PoV of a site owner, because a sidebar on a forum of this sort is where I'll typically place a video ad player, a 300x250 IAB banner, or other information that I think will be useful to readers.
These are just a few and minor UI changes that shouldn't take a lot of effort to implement. But they will make Misago more apppealing to more publishers.
Note that these does not change the fact that I think that the underlying code is beautiful, and that most of the features I'm looking for are in place.