I also want to recommend the recently released Ascension, but a newer version of the map is desirable here, as the consequences of the bug are much deeper than just skipping a couple of battles. But the map has great potential; just take a look at it for a few seconds in the editor.
Among other small maps, there's Ville'de'Porte and Gremlins & Titans. Yar played the first one on stream the other day, and Silent played it before that. I recorded a few battles with it. It's a good map to pass the time. I haven't played the second one, but it has received a lot of positive feedback since then. The map itself has three versions in the archive, differing in difficulty level (timer limit).