I don’t know about other people but it happens to me quite often that I forget what weapon I had, either after returing to a mission after several minutes or even a few seconds when I check something else for a moment. Sometimes this is annoing because I wait for the next wave to shoot and when I shoot, if I don’t remember my current weapon, it can screw up my strategy. For exemple, if I think I had the positron stream I think I can just move quickly while I shot, and then I ended up having ion blaster, which is much slower, so I have to calculate my movement in a different way. This may be not so much of a problem in most cases, but there are some very specific cases where every millisecond counts and you’ve a clear view of the whole situation, taking into account the enemies, the projectiles incoming, the stuff to grab, and of course, your current weapon. Of course it’s better explained in game rather than words, but I’m sure some people can relate to this and know exactly what I mean.
Now, having an hud that would display the icon of your current weapon on one side of the screen would allow you to pause the game, take a breeth, and organize before continuing, because you can view your fire power, food etc., as well as the weapon you currently have, as well as most of the enemies, wave, difficulty, duration etc., allowing you to organize your movements and attack strategy before resume the game, instead of being like “damn, I forgot what weapon I had 1 hour ago. Now I’m in the middle of a bullet hell and I first have to shoot to remind myself my current weapon, only then I can think on how it’s better to move”. Again, maybe is hard to explain into words, but when you find yourself in these kind of situations you know exactly what I’m trying to say; it would be just for convenience sake.
I gotta admit though that I didn’t know about the fact that you can shoot during the brake between a wave cleared and the next one without affecting the precision medal, but again, as I mentioned above, let’s say you’re in the middle of an a very hard wave, and you have to pause and leave because you have to do something important, and then come back, and forget what weapon you had, and the scenario I mentioned above happens; it would be kinda frustrating.
There may be cases where there are the projectiles of your weapon already on the screen, which it can help, but 1: it may happen that you pause and there are no projectiles of your weapon on the screen, or 2: the opposite scenario: you’re playing in multyplayer, have to pause, and there are multiple weapon projectiles on the screen; how do you know what are the ones of your weapon? More so, have you thought about multyplayer? Where there are many players in one mission, how do you keep track of what is your weapon without be confused with someone’s weapon? If anything, the multyplayer aspect is a much stronger reason on why an current weapon hud should be added.