MabiPro: The Authentic Old-School Mabinogi Experience

As a pure mage from years of pre-genesis i find all suggestions in this thread disgusting.

Glacii sums up most of my opinions, just because a lot of game designs might seem as only a hindrance to a lot of people doesn't mean they aren't meaningful mechanics.

Mana
Both in lore and game design, what we call magic is only a poor imitation of what gods do, and unlike them we're slow, weak, and don't have a constant surge of mp and must soak up mana from the air and drink mana potions, mana is scarce and meditation's mana recovery multiplier is a blessing despite how small it may seem because every little bit helps. Magic is plenty strong, especially with G13's new magic damage formula and elemental mastery skills. Cast time and mana usage are the cons of magic. Mana evaporation i used to see as a countermeasure to avoid mediation forcing the player into walk by holding a wand, so if you're using meditation and wand together you are expected to be using the accumulated mana with the wand that is currently held but with the introduction of the trinity staff in G13 I see it as diversity between wands and staves.
Durability
Items have vastly different repair prices, repair npc of different rates are scattered and it's up to the player how far they will go for maintenance of their equipment. there are some upgrades which reduce durability for better effect if the player chooses effectivity over the inconvenience it brings, durability loss from enchant failures, enchants that increase or decrease repair price, durability bonuses from crafted items, how low the maximum durability becomes before the player decides looking into replacing their equipment. I understand that a lot of players want their upgraded equipment to last forever, but that gives you less things to do.

I loved the sprites of those crystals, maybe they could stack to 15 or 20

You're kidding right? If magic weapon mastery were to be added it would be possible for lightning bolt to hit 2~3k on critical hits with appropriate skills and gear. It would also mean you can beat both glas ghaibhleann and claimh solas with a fully charged ice-fire.