AWESOME idea nad plan layout should be easy to code always a pain to buy buffs 1 at a time.
My personals would be the teleporters should port you to the harbor for 1 i know it's a small thing but porting to the marketplace and waiting for the loading bar then turning around clicking harbor for another loading bar really irks me.
Also adding meridia to the teleport list and maybe necropolis along with adding them to the teleport spell list and hopefully greater teleport.
I second the send multiple items in mail and more money per mail thing i don't care if it costs more than mailing 1 thing at a time it is very annoying and shouldn't be imo.
Locking task bars so they actually lock and not so they lock after an item is removed from them and you can't remember what it was even tho the bar was supposedly locked alrdy.
Siberius dragonshards fragments have an add all button in the stone so you can just put however many you have and click combine and get whatever you could out of it instead of 1 set at a time.
thats all i can think of for now i'll be back when my brain wakes up