I don't understand from the blog post they'll support the X Compact.
Further, there’s been some interest to support the more pocket-able version of Xperia X, the Xperia X Compact. As we’re working already on two other new devices (the dual SIM and the to-be-announced), we don’t yet have the necessary business case to commit more resources ourselves to finish up the Xperia X Compact full solution. However, this is something we’re openly looking at: if the community adaptation will be good enough in the near future, we look for alternatives to start support it. We’ll come back to this as it develops.