The fact that you have a "melee slot" and a "bow slot" is quite telling, actually.
It probably didn't even occur to them to allow two melee quick slots. This design choice reveals a preferred playstyle. Versatile melee+ranged is not the only playstyle or build by any margin but this is how Larian thinks everyone "should" play the game.
This is why Phase Spiders suddenly spit powerful poison. Why goblins have so many fire bombs and explosive arrows.
This is why everyone is highly mobile jumping, flying or burrowing around. Why there are haste and teleport items everywhere.
This is why tanking feels completely irrelevant in BG3, because the developer thinks only blitzkrieg style high mobility high DPS combat is fun. They probably can't even imagine a tanky melee build who would prefer a Greatsword and a Hammer+Shield setup. This is made even more frustrating by the fact that tanky low Dex builds can still use thrown weapons and that spellcasters use Cantrips instead of bows at range. The "bow slot" is already completely redundant and has been for the last two years, but it's still there. Because melee+bow is how you should play. It's more fun than anything else, for everyone.
