No, there were no PRs of replay module. I do not think that it is production ready and in my opinion someone with knowledge of CCG internals should take a look at sources first. Also I do not know whether it is essential module for CCG - and, when merged, it will need some attention with every CCG release.
It was/is useful for me - it can be used as simple recorder and also for replays and delays - but maybe ffmpeg can be used for same purpose with similar results now?