Is there a chance for official NanoPi K1 Plus support?
Only boards which are or will be officially supported by Linux kernel can be supported. Somebody must submit DT upstream and once it's confirmed, we can talk again.
Note: We don't accept additional out-of-tree wifi drivers anymore. It's also stated in first post of this topic. In short, unless someone manages to include rtl8189ES driver in Linux, it won't be supported.