But the mace is too much like Hawkman. It's like giving Captain Marvel heatvision. At least fletchette feathers fit in with the character's power. Spider-Man has spider-powers and webshooters, Archangel has wings and deadly feathers. More than that and you risk turning him into the Punisher with wings.
Besides which, Scott is the one with the Olympic-level understanding of geometry, so giving Warren grenades is like bypassing Black Cat to give Spider-Man a push-up bra and high heels. You're just not playing to people's strengths.