Here are some example of perplexing behavior fixes:
- https://github.com/Unvanquished/Unvanquished/pull/1248, that fixes some tiny things like when the UI showed 6.0 morph point, except you actually have 5.96, and can't evolve because of that
- https://github.com/Unvanquished/Unvanquished/pull/1251, that adds some visualisation to make a hidden healing feature more explicit
- https://github.com/Unvanquished/Unvanquished/pull/1281, that fixes a "corpse teleportation" glitch
- https://github.com/Unvanquished/Unvanquished/pull/1287, that fixes a "reactor zapped through walls" bug
And some of them are still work in progress, so that proves there is continuous work being put into it:
- https://github.com/Unvanquished/Unvanquished/pull/1550: a stepping stone towards a tutorial: if you want players to learn how to destroy the enemy base, you need bots not to destroy it before they do.
- https://github.com/Unvanquished/Unvanquished/pull/1546: it fixes quite some oddities with the armory, that can be confusing for people
- https://github.com/Unvanquished/Unvanquished/pull/1484: it is always frustrating to be denied evolving just because you are too close to walls
Other people are also doing useful work in their own area. For example freem is working on making bots more interesting, which helps when there aren't many players around; illwieckz (among others) has been testing the game on a lot of hardware to ensure it works correctly; Gireen (among others) has been doing some UI work to ease the first run a bit, and others have generally been pushing it forward too (it's not because I haven't mentioned you that I have forgotten you ).
By the way, for the "aim at head" thing, we can also consider a tutorial where enemies are humans in battlesuit, except they forgot their helmet :P We could also add some feedback in-game, for example some sound when headshoting.