A. Thief guilds.
I like the part about different Thief Guilds but I believe it's not functioning as it should. I hope to see conflicts between guilds and fighting for recruit memberships. Current situation is everyone joins all guilds for protection which is not supposed to be. Should be like Gangs of New York.

What I like to see :
1. If you join one guild, you should not be able to join another. Three guilds namely with guild fees and functions - Galadon, Tar Valon, Hamsah. One benefit will have personal Thieves' Cant channel which will not make a thief step out of shadows while communicating and fencing of goods. Each guild protects their own cities from shoplifting/stealing by other thieves.

I suggest that either the guild you belong to is proficient in 2 different paths, and the rest you scout to other non-guilded places for path learning,

OR

If you join a guild, you are restricted to that path or two, which is a war between different skills. Hamsah could be a smuggler/thug type, while Tar Valon is a research poison/trap and Galadon could be a cityties/binder/push, etc.

B. Contact poison.
Contact poison should be applied not only to weapons and armors (I mean how many people wear/change armor during combat though weapons are fine), but also apply to potions, pills, wands, staves, scrolls.