I tried the Daily Build ISO and i think some enhancement for the next LTS could be done:
Ubiquity need a better support with experimental features like LVM and ZFS because you need to erase the entire disk. You can’t create a partition manually.
When trying to quit ubiquity from the topbar it doesn’t work. You need to right click on the icon and click on «exit».
Also it would be nice to fix this issue : https://github.com/micheleg/dash-to-dock/issues/1007