It is my understanding that the Boutique is undergoing a complete rebuild and will even be separated from the Welcome Center. I would think until this project is completed that boutique feature request will be on the back burner. @lah7 is the dev, maybe he will tell us more about the new boutique, when we can expect it and how current feature request are handled.
Development of the "new" Boutique is progressing... pretty slowly... We'll try and get this one up and running for 17.10. (Time for me is an unfortunate restriction these days!)
That said, ideas are welcome for Welcome and the Software Boutique. This one could be possible with another idea that a piece of software could have "optional extras" that can be installed in addition, similar to how it would benefit RetroArch:
Well going from scratch does take time and effort I think, good news with the new boutique, but please don’t go emulators for gaming, steam is making a lot of progress for the linux gaming and deserves that spot!