I would like this feature too. Merging the Feature Request I just made here:

For most of my emulation I prefer the simplicity of Retroarch and its many cores but fine tweaking those cores isn't always possible as it is with the more feature rich emulators those cores are based on.

For instance ...

Sorry I'm a new user but I'm having trouble with two Retroarch cores. The mednafenpsx core issue has been reported but I'm also seeing a similar failure to launch with parallel_n64_libretro.dll. I noticed the Runway app is listing the old file name for this core 'parallellibretro' but it was updated ...