Some of these suggestions are from other clients and some I understand will be hard to implement.
I also understand that some of these may already exist within Terraclient, I don't have time to read all the features right now though.
Features:
Changeable Usetime on any item
Stack command (Fills current held item to either max or a number of choice
World Edit (Self explanatory)
Change projectile of any item to any projectile
Change respawn time slider/changer
Clear gravestones (Clears gravestones within a certain radius)
Fly slider/changer
No Clip slider/changer
Speed slider/changer
Gravity (Enables gravitation potion effect)
Jump height slider/changer
Mob spawn rate slider/changer
Summon NPC
Max Minion Count
Summon Minions (Spawns different minions that you can choose from a menu)
Some of these suggestions are from other clients and some I understand will be hard to implement. I also understand that some of these may already exist within Terraclient, I don't have time to read all the features right now though.
Features: