High Level Monsters Should Drop only High Level Potions:
Why do low level potions drop from high level monsters? 4800 HP potion does nothing for a dual class player. Change it so only Full health/mana potions drop from high level monsters.
Only Blue Rare Items Should Drop:
Red rare items are pretty much useless. When leveling up it can be nice to find a red rare that increases your damage a little bit, but once you start making your own rares they become useless. Aside from legend items, dual class items are also pretty much useless because their rare effects can only be red +1 or g1. Maybe make it so you can combine dual class items, just not craft them, so when they drop they're useful for more than just selling to vendor.
Secondary Job Skill Quests Take too Much Time:
I have 70 tailoring and the NPC ask me to make 35 Mischa. I spend 45 minutes gathering scorpion scales (spawn is so small so it takes forever), and with 175 scorpion scale I was only able to make 7 Mischa. With 70 tailoring skill, making a level 70 tailoring item has a very low success rate, like 20%. At this rate it will take me 4-5 hours just to do a single quest since I have to gather enough materials for 150+ Mischas because most attempts will fail. I understand Merchant isn't supposed to be easy to get, but this isn't much of an improvement over the old system. I'm not sure about the other quests, but at this rate getting tailoring GM seems like it will take 30 or 40 hours total if the level 70+ quests take this same amount of time. Secondary job quests need to require less items.
Spell Animations Need Fixed or Add Timer
I don't know if it would be too difficult to fix this, but it would be nice to have buff spell animations fixed so that they always display correctly. Right now, even buffs you cast on yourself can sometimes have the animation show incorrectly. Half the time I die, I die because it looks like I have SFD buff but I actually don't. Having the game show a timer for your buffs, or at least properly display the animations of your own buffs would be awesome. Ideally, I'd like to see spell animations even for people who got buffed when they weren't even on your screen, but I don't know if that would be too difficult.
Increase EXP For Low Level Players
I'm just guessing, but I imagine low level players will have a very hard time leveling up in the weeks following the time the server goes live. For the first couple weeks, players will have a decent amount of other players to party with, but after that there won't be many people. Leveling solo at low levels in Dragon Raja can take a very long time, especially for warriors, which I think would decrease the chance that new players would come to the server. Perhaps it would help to increase the exp rate for low level monsters a couple weeks after the server goes like (maybe 2 or 3 weeks), that way new players can level up easier. Of course this wouldn't apply to level 100+ monsters, perhaps stop at minotaurs so it can't be abused for fast tactic by Crossing Class players. I remember when I tried to start playing DR on NewRaja I had to solo the entire time (the last time I played DR before that was the .my server), and I eventually just got bored at level 85 or so and stopped playing. Low levels are nothing but a grind anyway, so I think it would help the server population if low levels could level up faster.