These plugins would be very good to add, they would make GtkRadiant more flexible and much more extendable!

One of the features this would make feasible is:

• Automatic light placement (this detects the brushes and models the level use and puts the light actors in a offset determined by a configurations (INI) file, that determines what offset should the lightsource be from each model and surface, also taking into accuont the object's rotation)
• Automatic patch placement, for square corners
• A better Hollow that bevels the brush corners
• A CSG plugins that allows to put Addictive and Subtractive brushes in a subtractive world. The plugin would then generate all the addictive brushes needed to make the map in Q3's addictive void world!
• Assistant for moving brushes hooray!
• Brush to model plugin
• Automatic block brush placement (by block brush I mean path, vis, bot, bumper, collision blockers, like those that fill Q3DM1's walls)

And much more! It all depends in the scripter's imagination, and often in popular demand!