The key question that FindMyPast should answer is why are these Welsh Parishes pulling out of FindMyPast? I presume they spoke to the respective Parishes and therefor know what reasons were given?
Going forward one would hope that more baptism, marriage and burial records would be added, indeed eventually all of those available. This retrograde move diminishes the value of FindMyPast.
I hope they take the suggestion of warning prior to removal of records so that those active researchers can quickly access what they need. They should also include updates on removed records with their periodic emails regarding new material.