people who claim it wasn't popular need to get their heads checked, Steam alone seems to show that more than half of the playerbase have played it, and the forums state hardcoe mode is a joy to play with. Again people keep saying the whole "oh man I hate drinking and eating", yet forget the combat situation that forces players to think carefully instead of slamming their head into bullets and spamming the hotkey for stimpaks. Obviously this mode was still in it's bare bones, but it's proven to have a positive effect on the majority.
so in other words: it shouldn't be removed, but rather improved on.
People keep focusing on the tedious crap, but never on the actual affects on combat.