Wouldn't it be cool if you could channel your weapon's enchantment and launch it, dealing the same effect as the enchantment. but at long range, just like a spell?

Well, that would make mages less unique than they are, so no.

Though having more "magical" weapons could make for a more interesting "mystic warrior" roleplay.

Why? Anyone can use magic staves, and the weapons would function just like them.

No point in that really, It will make players way more Overpowered than they already are, even if they don't know it! x

They would ruin the point of it being a melee weapon.