Interesting. There's someone monitoring this board and CX doesn't want us to see this new config yet. New regional seats I think! If it was simply taking out 2 rows I don't think it would warrant a "new config being gradually rolled out" message.
If there is someone monitoring this board, then I would like to send them a very clear message: Your IT department is utter rubbish. It is a shambolic mess. If the new seat map was not meant to be released then your IT department should not have uploaded it. Someone needs to take clear charge over there and whip them into shape - the CX website is hopelessly inconsistent across its fleet information; with different styles used to describe the individual type of aircraft (e.g. there is now a "figure 1" for the 773 without a "figure 2"; some types carry a three letter alphanumeric code while others don't). This is without even getting started on your travel newsflashes, most of which are written in the most appalling English. The website is the first port of call for many of your customers. Is it too much to ask you to slick it up so it doesn't look like an unprofessional mess?
The disclaimer is probably there to warn people that their row 55 exit seat on the old config might turn into a back row cabin seat on the new config. Though new seats would be lovely, I suspect it's just the two rows being pulled to match the declining J demand.