I sometimes use it for monster infighting, zombies, mi-gos, triffids, mutants and fungaloids are fun to watch in a death match, maybe even spy on enemies to avoid line of sight, but I find it easier to just read the log and/or minimap, so I just reuse those keys for more useful actions such as toggle run, activating items, bionics, mutant or modded abilities, etc.
Speaking of which, it's really annoying that you can't unbind movement keybindings even if you use arrow keys since if you do so they won't work at all, not even in the menus (I had to reinstall the game and launcher because of it once, lost all my saved options and keybindings)