A little torn on this one - as a character I find it critically important to use the exact, right tool for the job. As a player, I just want to roll one die and move on.
MM can get in line. I have to imagine that every other small press/indie system uses this.
Would you be okay with "one handed martial d8 slashing versatile (1d10), describe how you like?" instead of "longsword"? So for one character it's a longsword, another it's a short razor whip, another it's a bronze spear, depending on their concept and the setting?
I feel that weapon choice should matter, and I would like a bit more differentiation between them. There are many ways this has been done (such as AD&D's damage vs size, 3E's crit range, or 4E's attack modifier), and new ways this could have been done (fighting styles, feats, class/racial abilities, even backgrounds).
Would you be okay with "one handed martial d8 slashing versatile (1d10), describe how you like?" instead of "longsword"? So for one character it's a longsword, another it's a short razor whip, another it's a bronze spear, depending on their concept and the setting?
In some games, sure. But not in D&D. Weapons are tools, and I prefer a game where a my character chooses the right weapon for the circumstances, as opposed to one where the choice of weapon is stylistic.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.