I can't see carrying a great axe and a halberd RP wise. For tunnels and other in close fighting, a short sword makes more sense. I don't see someone switching from a halberd to a great axe and back to the halberd in the middle of a battle. I can buy wizards slinging fireballs at dragons, but weapon caddying mid battle between ostensibly similar weapons breaks suspension of disbelief. Would your character know one does a d12 and the other does a d10? Simpler to just carry the halberd if that is your schtick.
Compare that to stat increases, where +2 str will give you +1 damage on every strike and improve skills.

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