Share 'Pain Points in Grasshopper'

(Edit. David sez: Please append your (well explained) ideas/suggestions/wishes. I don't care much for what you want, I care why you want it.) Perhaps this topic has been covered recently, but I don't see any active threads.  We're looking for a plugin project and I'd like to get some feedback from the power users before choosing something. So... What is missing from grasshopper?   What would…