Displaying the remaining wave really sucks the life out of the action, kinda gives an artificial advantage to see the inner guts of the Drama system. I think it's fine for the lowest difficulty, but I really don't think it belongs on Overkill, at least make it possible to disable it in the settings because I don't want to see it. There's been many Payday 2 mods to display when an assault would end based on the timer, but displaying how to kill an assault seems strange as it's an absurdly high ceiling to reach (rightfully so, it should be high)
Cool system tho, good to have accessability to explain how assaults work to new players (and apparently old players that never knew this is how assaults have always worked) although it might be a bit vague with a random bar going up and down seemingly for no reason, the loud tutorial should maybe mention it.