It's also possible to keep Logic "in the loop" as a sound source: play its instruments via Reaper and record the instruments in Reaper. In that scenario you can circumvent the PDC bug, and the automation timing issue, but still use Logic's great VI's. The idea and a possible execution is discussed here:
I've set it up via the loopback function in RME's totalmix software (and the IAC bus), but you could probably set it up using something like BlackHole too.
Cheers, Merlin.