There is still a lot of work to be done installer side, I'll mention the annoyances for me:
* There is only the cli installer, I do not mind since I prefer this
* Manually partitioning they are using parted or cgdisk and both are insane! cgdisk you need to input partition size in SECTOR SIZE!!!!!! Really?!
* Ran the installer more than once since some steps are not set out very clearly - this to a once Gentoo user and veteran Arch Linux user.... not good...