At first, please summarize all 1.6 features from other threads which you already marked as "should be solvable by scripts in 1.6" 
Other than that, I have these ideas:
* read file + string operations enough to parse them. For example I'd like to write a script importing a BL set inventory as .pdb - without any LDCad restart.
* find groups of connected parts - all functions needed for that (searching parts, their snap points etc.)
At lower level, I'd wish one very generic feature: make as many current (sub)menu items as possible be new API calls so they become accessible from the scripting language as well. For example working with selections, models, steps, coordinates etc.
Other than that, I have these ideas:
* read file + string operations enough to parse them. For example I'd like to write a script importing a BL set inventory as .pdb - without any LDCad restart.
* find groups of connected parts - all functions needed for that (searching parts, their snap points etc.)
At lower level, I'd wish one very generic feature: make as many current (sub)menu items as possible be new API calls so they become accessible from the scripting language as well. For example working with selections, models, steps, coordinates etc.