What does the BC-Robots does, what MFR does not? If you have both you will use MFR.
The main problem is, that the mod packs lake of red line, the user can follow. Why to use IC2 if you have TE? Why use BC robots, if you have MFR?
I miss a theme in most FTB mod packs. Example: I tried Resurrection, because i want to test GregTech. Why is TE included in this pack? It's pointless. It should be build around TE
or Gregtech, but not around both mods in same pack. So, i stopped playing this pack.
Many mods are pointless, if you also have other mod which do the same job more efficient (cheaper, less annoying, faster). So, they should be separated in different packs. I never start to use Steve Cards, because i always have MFR and Quarries, which do the same job much easier and better. I never used railcraft cards, because i always can use tesseracts or any other teleport technologies to transport items over long distances.