So what do I suggest?
My first suggestion is adding offensive/defensive/support spells.
It's too late to say it won't fit the game because the game already has enchanting, magic potions, a few mobs using some kind of magic and undead.
My second suggestion is to improve swordplay, so it's not just about who clicked first or who owns the diamond sharpness IV sword.
I think bows are ok and strong enough when you get the resources to farm arrows.
Magic? Too overpowered.
No, I won't suggest "zomg wat if u could make a wand with two sticks and if u right clic it shoots creepers and it never runs out!!11"
I'll explain the magic system I thought of now:
-Spells
Spells would be the basic for magic. They would be a glowing piece of paper, rarely dropped by strong and magic related mobs like endermen, wither skeletons and ghasts, or found in dungeons. To use it, you must craft a wand, and drop it in your active spell slot. Spells would be activated by right clicking with your wand anywhere, then casted performing some task like drawing a pattern that appears in your screen while holding right click and then, when you are done, your wand glows and you aim (the pattern will stay ony about 10 seconds so you dont "store" your spell there) and you left click and bam!, you just ignited that ugly creeper with your mighty fireball. More powerfull spells require drawing harder patterns.
-Wands
Wands deal no good damage on their own. A cheap wand without spells is just like attacking with your fists, but better wands would deal decent melee damage (nope, not like a diamond sword). Better wands however, deal more damage when you cast a spell, wands are crafted with sticks (or blaze rods for the best ones) and a tip, the weakest being ender pearl, and the strongest being the nether star. A wand enhances your offensive and defensive magic, and also better wands have more duration.
Take for example a simple fireball. While using a wand made of sticks and an ender pearl it deals 4 hearts to non armored mobs or players. It uses 2 exp to be casted (A spider gives 5 exp) and to cast it you have to draw a small circle with your crosshair. It also makes you a bit hungry. That's it, no spell spamming, spamming would be just plain stupid as you may lose your hard gained levels fast and starve. As I said, it would require skill to become a successful magician.
Wands also would have an special move each one, for example, teleporting 4 blocks in the direction you're facing each time you use it with a wand with an ender pearl, teleporting to your bed with an eye of ender, lightning strike with a nether star.
This of course would use exp and cause hunger, but wouldn't require to draw a pattern.
Example Recipe:

-Spellbooks
Spellbooks would be crafted or bought (with npcs) as a portable chest that only hold spells, so you dont get your inventory full of spells and leave your beloved porkchops at home. They wouldn't be really hard to craft, maybe just a book and a diamond, but again, they're nothing without spells wich are hard to obtain, killing mobs or in creative mode only.
Some examples, so you imagine the possibilities.
Fireball. Your new best friend, both if you're a powerful magic freak or a guy who likes hacking and slashing too.
Great Fireball. Harder pattern, more exp use, more power, leaves the victim burning for a while.
Healing. No potions, you're heavily injured and a horde of creepers is coming. Use this spell and you will regenerate your health instantly.
Healing projectile: Same as above, but instead of healing you, you launch a projectile at your wolf, tamed cat, or friend to heal him.
Knockback wave: Creates a powerful wave that pushes your enemy backwards, deals a bit of damage and gives you some time to plan your next move.
Freezeball: A ball of freezing magic that stuns the enemy for a bit giving you time to attack him, or run. Better wands increase the stun time.
Please note that projectile spells can be dodged, specially by players, spells move as fast as arrows so it ain't easy tho.
Also, getting just fireballs from mobs isn't cool, so you can exchange spells with your friends.
Also, spells wouldn't replace potions and splash potions, even if they're used instantly and may inflict more damage, they would require exp use and skill to perform.
A Starstorm Wand lauching a simple fireball at a cobblestone wall:

Swordplay
Ok, swords are strong enough and don't really need to deal more damage but the fact that you just jump and spam click has to change. I tought of a sword parry, by clicking both left and right mouse buttons to perform a counter attack (the animation is already there, when you mine while shielding with your sword!) in the moment you're going to get hit by a mob or a player. If you do it properly, you take no damage, hit the mob or player with 150% damage and he gets knocked back 2 or three meters away. If both players perform this move at the same time, none recieve damage and both get knocked back. Fighting this way at the edge of a mountain would be just epic. Also, to protect the sword users from magic, some projectiles could be deflected just the way a ghast gets backfired. So magic won't make swords or bows look like toys, the battles between different kinds of fighting styles, or someone skillfully combining all three would be epic. Just imagine someone using a bow to protect a magic user throwing fireballs at some sword user, as he aproaches quickly trough the battlefield, dodging and deflecting projectiles!
No matter if you agree, you think this suggestion could improve a bit, a lot, or just sucks way too much, give feedback please!













