DianSong -
The forums are a perfect place for this!
This is informally happening now as many NI employees are active in the community getting exposure to how end users are using NI products and what features they would like to see. There have been several threads over the years where users have given their feedback to different R&D teams and developed "Wish Lists."
Currently in the LabVIEW forum, an employee is asking users to share their idea of how to measure the size of a LabVIEW application and for details about what the largest application they have built does and what it was like to build and maintain.
We encourage this 100%, and I think it would be great if you started a thread to talk about your experiences and your feature requests to share ideas with other community members and NI employees.
Thanks,
Molly K.
Web Support & Operations Manager
National Instruments