Unless I'm mistaken, Pewds fully intended to stay behind the others and get hits in while he could, meaning there would still be meatshields and an unequal chance of dying, just everyone would be using melee.
I'm opposed to magic, but a game where everyone uses melee, particularly a forum game when what you can do is limited moreso than the world of "light novels", anime, and the like, wouldn't be terribly interesting, specifically because the fights would likely go roughly the same way in a similar manner to ones where there are ranged units... Just... Without the ranged units.
Also, what difference is there between throwing knives and having a bow, other than range and maybe carrying capacity, and maaaaybe power? You're still going to run out, but the arrows are going to be more beneficial to the team of players precisely because of that increased range.
That said, if you're going for grenade flasks, you do realize that I'm totally going to be building a character specifically dedicated to making and using things like that, right? Frankly, explosives seem worse for people in this setting than ranged weaponry - one of the arguments was that the melee people would get in the way of archers, so they wouldn't be effective, but I don't see throwing explosives around in a melee oriented game being a better option.