
Here are some of my ideas
1: Available options when talking to a NPC
2: HUD/ Current XP and needed XP until the next level
3: Maybe gold limit to avoid abuse
4: Hire mercenary that can help you on fights
5: Add arrows for bows to make it more realistic
6: Carry limit, when you reach the weight limit you move slower
7: Add boat as an item to let players sail
8: Allow lock-picking to chests
9: Paralyse/Freeze scroll (reduce player/monster movement)
10: Monsters will chase after you if they are getting hit until they reach to their spawn zone limit.
11: Allow NPC pickpocketing (you have a chance to steal gold from him but if you are getting caught you go to the jail for some minutes)
12: jail [id] [reason] command for GM its effective when some of the players are getting annoying
13: When a monster is getting killed only the person who killed it can get the items, if the player will not be interesed in geting the items then after a couple of seconds the other players can get the items, if no one needs the items then they dissapear after 2 minutes
14: Double XP potions and so on
15: Skill/ Healing Light, heals (random) hp of the target depending of the skill level
16: Buff/ Arcane Blessing, gives targeted player (random) strength for some minutes
17: Skill level, the more you use it the better it is when casting it