The only problem with including a lube vial holder is that different vendors package lube differently. Do you really want to re-package your lube into an included vial that fits into a holder on the lubing station? What if the station includes 1-2 vials, but you get a third type of lube? It seems simpler to just leave the lube elsewhere on the table and simplify the lube station to just hold the switches.
The point is to keep everything together and relatively secure. It doesn't have to be a perfect fit but just big enough to keep some small containers in place.
I would personally transfer lube to a new container if it was some type of easily acquirable vial though.
I suggested it as an attachment instead of including it in the base product because I didn't think it would have universal appeal. If it's an additional option, you don't have to buy it if you don't want it. Since the GB is about to happen apparently, maybe this could be an option for a future R2.
