God already has performed this new heart transplant surgery on many of His children (on every born again and saved believer in Jesus the Christ), but He is not done. Indeed, He continues to be in the heart transplant business.
Will there always be people who call these backward, prostrate, and on the knees “slain in the Spirit” phenomena the work of the devil? Yes, after all, Jesus Himself was accused of being an agent of Beelzebub, just because Jesus the Christ was able to perform many fantastic miracles, signs and wonders (cf. Luke 11:14-15).
The Holy Ghost is fully God. Like God the Father, the Holy Ghost is eternal, omniscient, and omnipresent. The Holy Ghost has a will, and He can speak. For sure, He is very much alive, and, like Jesus the Christ, the Holy Ghost has an earthly ministry. Furthermore, He is ONE in purpose with God the Father and Jesus the Christ the Son. The Trinity or Godhead, thus, operates in perfect harmony.