What about the scenario with the separate boot partition in Linux (or *nix in general)? Obviously chainloading to / will no longer work, and just pointing EasyBCD bootloader to /boot sounds kind of dumb Any comments will be appreciated!
You still point EasyBCD to the partition where GRUB is installed ***to the bootsector***
The physical location of GRUB's boot files (whether / or /boot/ or /timbuktu/) is not important - just the bootsector is. Be sure to install GRUB to the bootsector and point EasyBCD to that partition and you should be good to go.