One problem of RPGs is the interface-
/cmds are good for small mods, bad when you have to use ten to do anything. (Aloshi's RPG for instance)
GUIs are good for mods which only a host should use and not as useful in other situations. (AoT and RTB avoided this be being the only game/most common version of the game, one of the problems with Portals/Doors/etc JVS mods is that they require a GUI and can break compatability)
Special Wands or Guns are good when you need to set lots of specific bricks to a property but can get annoying when it doesn't save or when you have to get ten different wands just to hold all of the random properties to put on bricks. (Hammer, Wrench, Printer, Wand, Decollisioner, Team Set Gun, Door Maker, Scale Changer, ...) They aren't too useful in RPGs either.
Specialised bricks are useful, but sometimes need BLBs downloaded or can't fit a certain area - "I need a 64x64 hookshottable area, wait, it's only in 1x1F and 4x4 bricks...".