I just read another article about the critical edition:
Somaratne, G. A. (2015). Middle Way Eclecticism: The Text-critical Method Of The Dhammachai Tipitaka Project. Journal of the Centre for Buddhist Studies, Sri Lanka (Journal of Buddhist Studies). Online here
It is more technical in describing the procedure of the edition and giving a short manuscript background for the pali suttas. Both are interesting to read, especially for those interested in EBT manuscripts…