That sounds awesome! I have an 9.2. Installed to internal On my play 2. Any chance there will be a chance to upgrade it?
The changes are in the nightly files now *but* like all LE10+ images it requries clean-install, there is no upgrade. To use the upstream u-boot on the box you need to first boot from the 'box' image then use emmctool to erase emmc (removing all traces of vendor u-boot) and then write the -wetek-play2.img.gz file to emmc. I strongly suggest you experiment with the 'box' image first before doing that, as while the LE11 codebase is quite usable on S905/S905X/S912 devices now, it's not as feature complete as the legacy one. If people do this and then want to go back, I do have a raw disk copy of the factory Android image on emmc which can be restored.