No, this is actually a good thing.
Yoshida’s response explains, in no uncertain terms, that the team vastly underestimated the number of people looking forward to housing in Shirogane and will be working to add additional housing plots for the game’s next major patch. There’s also the implication that sales and even structure for these plots may be notably different, as the team is reviewing a great deal of feedback to prevent the Shirogane issues from showing up again. To avoid speculation, nothing will be announced on this until it is ready. While it’s too early to say exactly what form this will take, it seems clear that the complaints about how badly housing has been handled will result in some changes.
One may wonder how in the world the volume of demand would surprise anyone, but let’s not dwell on that for the moment.