Er inni gwblhau astudiaethau cynhwysfawr wrth gynnal Adolygiadau o’r Farchnad Agored ar gyfer cynllunio rhaglen Cyflymu Cymru, daeth yn glir bod angen dadansoddi ymhellach, ac felly cynnal adolygiad arall, oherwydd y newidiadau pwysig sydd wedi digwydd yn y cyfamser. Un o’r newidiadau hyn yw bod eraill wedi dechrau cystadlu yn y farchnad band eang cyflym iawn a bu newidiadau i’r gwasanaethau a ddarperir gan Fibrespeed yn y Gogledd, a newidiadau hefyd i’r modd y mae ffibr cyflym yn cael ei gyflwyno ac i’r rhaglen super-connected cities . Roedd yr adolygiad yn cydnabod ei bod yn bosibl nad yw datblygiadau adeiladau newydd, nad oeddent yn bodoli pan gynhaliwyd yr adolygiadau gwreiddiol, mewn sefyllfa i allu manteisio ar wasanaethau band eang cyflym iawn.
It became clear that a review was necessary because although comprehensive studies, known as Open Market Reviews (OMRs), were carried out as part of the planning for the Superfast Cymru programme, a number of significant changes have occurred that made further analysis necessary.  In particular, new players have emerged in the superfast broadband market and changes have been made to services being provided by Fibrespeed in North Wales, to the footprint of commercial fast fibre roll-outs and to the super-connected cities programme. The review also recognised that new property developments, which were not in existence when the original reviews were undertaken, may not have been built with superfast broadband capability.