I am enjoying Lakka on RPi2. Thanks for the port.
I have been playing the fba core most and noted Capcom CPS2 and Capcom pre CPS (Pang/Super Pang hardware) display the wrong aspect ratio.
On the point of Final Burn Alpha does the RA/Lakka core get updated as I see a new release was posted one day ago at neosource adding more arcade systems.
And the fba guys are now including home systems starting with Master System/Gamegear.